unusual display problem

[the images will be posted as replies due to size limits]

For a while now I have the following problem. After boot and login things look OK,
however moving any window shows terrible artifacts.

Here is an example using xterm.

20200402_093920.jpg
    I open a small xterm
Looks OK.

20200402_100028.jpg
    I do a reverse search: ^Rls -l
At this point the whole line is filled with a repeated quote character. Doing other things will
repeat a substring of what the text holds. Hitting 'end' key will show the full text followed by the quotes.
Very difficult to work when parts of the text disappear or get mangled.

20200402_094034.jpg
    Moving on, I grab the window and move it a bit. The whole window is filled with a pattern, here is is
just a color pattern.

If the window gets repainted it looks OK until I move it again. The only way I found so far to fix it is to restart X,
so logout then login, not nice.

I am on fc30, fully up-to-date, using the onboard graphics of a 'Gigabyte Z390 UD' with a "Core i7-9700".

TIA

unusual display problem [image 3]

On 2020-04-03 08:51, [e-mail] wrote:
> [the images will be posted as replies due to size limits]

[this part includes the images]

unusual display problem [image 2]

On 2020-04-03 08:51, [e-mail] wrote:
> [the images will be posted as replies due to size limits]

[this part includes the images]

unusual display problem [image 1]

On 2020-04-03 08:51, [e-mail] wrote:
> [the images will be posted as replies due to size limits]

[this part includes the images]

[Patrick O'Callaghan]

On Fri, 2020-04-03 at 08:51 +1100, [e-mail] wrote:
> [the images will be posted as replies due to size limits]

It's better to post images on a public file sharing site rather than
splitting your message into multiple posts.

poc

The following is OT of the subject line.

On 2020-04-03 09:16, Patrick O'Callaghan wrote:
> On Fri, 2020-04-03 at 08:51 +1100, [e-mail] wrote:
> > [the images will be posted as replies due to size limits]
>
> It's better to post images on a public file sharing site rather than
> splitting your message into multiple posts.

I know. The list guidlines says to post files to fedorapeople.org but my login failed (but is now OK).
I am not convinced that this is where people casually post content, it looks more like a contributors
site, for developers/testers etc.

I thought I should try the pastebin link (mentioned in the guidlines) but it seems to be for text only (?).

Nevertheless, I reduced the images as much as is usable.

BTW, does anyone know how I ask to delete the original post (with everything in the one message) which
"awaits moderator approval"?
> poc

Regards,

[stan]

On Fri, 3 Apr 2020 08:51:27 +1100
[e-mail] wrote:

No definitive answers, just some questions to point you to
troubleshooting.
> [the images will be posted as replies due to size limits]
>
> For a while now I have the following problem. After boot and login
> things look OK, however moving any window shows terrible artifacts.

Desktop?  Desktop manager?  What if you try a different desktop, or
desktop manager?
> 20200402_100028.jpg
>    I do a reverse search: ^Rls -l
> At this point the whole line is filled with a repeated quote
> character. Doing other things will repeat a substring of what the
> text holds. Hitting 'end' key will show the full text followed by the
> quotes. Very difficult to work when parts of the text disappear or
> get mangled.

Sounds like the input is being altered.  Is it possible the keyboard is
having issues?  Could you try unplugging it and re-plugging it?  How
about memory, power supply?  Heat?  Is there dust buildup?

What happens in virtual consoles?  Say Ctrl-Alt-F2.  Are there problems
with text changes or color?

How about with a different terminal in X?  Problem still there?
> 20200402_094034.jpg
>    Moving on, I grab the window and move it a bit. The whole
> window is filled with a pattern, here is is just a color pattern.

Again, this seems like the data is being mis-read, and color
characteristics are being altered unintentionally and randomly.
> If the window gets repainted it looks OK until I move it again. The
> only way I found so far to fix it is to restart X, so logout then
> login, not nice.

Does it stay fixed after the restart of X?  Hardware errors should
recur, while software errors will be fixed by reloading.

Thanks Stan,

On 2020-04-03 12:54, stan via users wrote:
> On Fri, 3 Apr 2020 08:51:27 +1100
> [e-mail] wrote:
>
> No definitive answers, just some questions to point you to
> troubleshooting.
> > [the images will be posted as replies due to size limits]
> >
> > For a while now I have the following problem. After boot and login
> > things look OK, however moving any window shows terrible artifacts.
>
> Desktop?  Desktop manager?  What if you try a different desktop, or
> desktop manager?

Plain XFCE with defaults.
    xfwm4
    xfdesktop
    lxdm
> > 20200402_100028.jpg
> >    I do a reverse search: ^Rls -l
> > At this point the whole line is filled with a repeated quote
> > character. Doing other things will repeat a substring of what the
> > text holds. Hitting 'end' key will show the full text followed by the
> > quotes. Very difficult to work when parts of the text disappear or
> > get mangled.
>
> Sounds like the input is being altered.

What input? I assume you mean keyboard and mouse.
> Is it possible the keyboard is
> having issues?  Could you try unplugging it and re-plugging it?  How
> about memory, power supply?  Heat?  Is there dust buildup?

I will try to re-plug the keyboard. Locking the screen (then unlocking) does not help.

This is a new computer that is clean and did not show any other problem so far.
The fact that restarting X by logout/login fixes the problem is a clue but I do not
know what to try.
> What happens in virtual consoles?  Say Ctrl-Alt-F2.  Are there problems
> with text changes or color?

No problem there. Switching VT (GUI->text->GUI) does not help.
> How about with a different terminal in X?  Problem still there?
> > 20200402_094034.jpg
> >    Moving on, I grab the window and move it a bit. The whole
> > window is filled with a pattern, here is is just a color pattern.
>
> Again, this seems like the data is being mis-read, and color
> characteristics are being altered unintentionally and randomly.

Does not look like a colour thing. If I move the screen at an angle then I get diagonal bars
across the window window (not the whole desktop) and no text visible.
> > If the window gets repainted it looks OK until I move it again. The
> > only way I found so far to fix it is to restart X, so logout then
> > login, not nice.
>
> Does it stay fixed after the restart of X?  Hardware errors should
> recur, while software errors will be fixed by reloading.

It always stays fixed. It starts (some time) on first login after a reboot.

Regards,

In case this matters - the system runs in 4k (3840x2160@30) mode which is on spec for the mobo.

[Anthony F McInerney]

On Thu, 2 Apr 2020 at 22:52,  wrote:
> [the images will be posted as replies due to size limits]
>
> For a while now I have the following problem. After boot and login things
> look OK,
> however moving any window shows terrible artifacts.
>
> Here is an example using xterm.
>
> 20200402_093920.jpg
>         I open a small xterm
> Looks OK.
>
> 20200402_100028.jpg
>         I do a reverse search: ^Rls -l
> At this point the whole line is filled with a repeated quote character.
> Doing other things will
> repeat a substring of what the text holds. Hitting 'end' key will show the
> full text followed by the quotes.
> Very difficult to work when parts of the text disappear or get mangled.
>
> 20200402_094034.jpg
>         Moving on, I grab the window and move it a bit. The whole window
> is filled with a pattern, here is is
> just a color pattern.
>
> If the window gets repainted it looks OK until I move it again. The only
> way I found so far to fix it is to restart X,
> so logout then login, not nice.
>
> I am on fc30, fully up-to-date, using the onboard graphics of a 'Gigabyte
> Z390 UD' with a "Core i7-9700".
>
> TIA
>
> Not sure what kernel. If still pre 5.2 boot with  i915.alpha_support=1

kernel parameter.

[stan]

On Fri, 3 Apr 2020 13:14:54 +1100
[e-mail] wrote:
> Thanks Stan,
>
> On 2020-04-03 12:54, stan via users wrote:
> > On Fri, 3 Apr 2020 08:51:27 +1100
> > [e-mail] wrote:
> >
> > No definitive answers, just some questions to point you to
> > troubleshooting.
> > > [the images will be posted as replies due to size limits]
> > >
> > > For a while now I have the following problem. After boot and login
> > > things look OK, however moving any window shows terrible
> > > artifacts.
> >
> > Desktop?  Desktop manager?  What if you try a different desktop, or
> > desktop manager?
>
> Plain XFCE with defaults.
>    xfwm4
>    xfdesktop
>    lxdm
> > > 20200402_100028.jpg
> > >    I do a reverse search: ^Rls -l
> > > At this point the whole line is filled with a repeated quote
> > > character. Doing other things will repeat a substring of what the
> > > text holds. Hitting 'end' key will show the full text followed by
> > > the quotes. Very difficult to work when parts of the text
> > > disappear or get mangled.
> >
> > Sounds like the input is being altered.
>
> What input? I assume you mean keyboard and mouse.

Yeah, you type something, and somewhere along the line between the
keyboard and the screen it is not processed correctly.
> > Is it possible the keyboard is
> > having issues?  Could you try unplugging it and re-plugging it?  How
> > about memory, power supply?  Heat?  Is there dust buildup?
>
> I will try to re-plug the keyboard. Locking the screen (then
> unlocking) does not help.
>
> This is a new computer that is clean and did not show any other
> problem so far. The fact that restarting X by logout/login fixes the
> problem is a clue but I do not know what to try.

That answers that.
> > What happens in virtual consoles?  Say Ctrl-Alt-F2.  Are there
> > problems with text changes or color?
>
> No problem there. Switching VT (GUI->text->GUI) does not help.

So, somehow connected with X.
> > How about with a different terminal in X?  Problem still there?
> > > 20200402_094034.jpg
> > >    Moving on, I grab the window and move it a bit. The whole
> > > window is filled with a pattern, here is is just a color pattern.
> >
> > Again, this seems like the data is being mis-read, and color
> > characteristics are being altered unintentionally and randomly.
>
> Does not look like a colour thing. If I move the screen at an angle
> then I get diagonal bars across the window window (not the whole
> desktop) and no text visible.
> > > If the window gets repainted it looks OK until I move it again. The
> > > only way I found so far to fix it is to restart X, so logout then
> > > login, not nice.
> >
> > Does it stay fixed after the restart of X?  Hardware errors should
> > recur, while software errors will be fixed by reloading.
>
> It always stays fixed. It starts (some time) on first login after a
> reboot.

It doesn't make any sense.  Could there be some configuration
initialization that is only occurring during the start of X, and then
when you logout and log back in, it gets those needed parts and works
correctly?  If that's true, it might be that X doesn't handle your
graphics device properly.  Or could it be XFCE.  I took a quick look at
bugzilla for XFCE, and this issue has not been reported by anyone else.
At least you have a workaround, if clumsy.

Maybe open a bugzilla against X, with the information from your posts
here.  Someone with expertise might recognize the issue immediately.

On 2020-04-03 13:50, Anthony F McInerney wrote:
> On Thu, 2 Apr 2020 at 22:52, <[e-mail] > wrote:

[trimmed]
> Not sure what kernel. If still pre 5.2 boot with  i915.alpha_support=1 kernel parameter.

fc30 is on a decently recent kernel:
    Linux e7.eyal.emu.id.au 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[Patrick O'Callaghan]

On Fri, 2020-04-03 at 09:51 +1100, [e-mail] wrote:
> I thought I should try the pastebin link (mentioned in the guidlines) but it seems to be for text only (?).

Not that I'm aware of. There are also plenty of other pastebin
equivalents. Some people use Google Drive, which works for anyone with
a Gmail account.

poc

[Anthony F McInerney]

On Fri, 3 Apr 2020 at 04:30,  wrote:
> On 2020-04-03 13:50, Anthony F McInerney wrote:
> > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:
>
> [e-mail]>> wrote:
>
> [trimmed]
> > Not sure what kernel. If still pre 5.2 boot with  i915.alpha_support=1
>
> kernel parameter.
>
> fc30 is on a decently recent kernel:
>         Linux e7.eyal.emu.id.au 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18
> 14:34:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
>
> --
> Eyal at Home ([e-mail])
> _______________________________________________
>
> OK , another shot in the dark. CPU Temperature.

On 2020-04-04 02:57, Anthony F McInerney wrote:
> On Fri, 3 Apr 2020 at 04:30, <[e-mail] > wrote:
> On 2020-04-03 13:50, Anthony F McInerney wrote:
>  > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:[e-mail]> <mailto:[e-mail] <mailto:[e-mail]>>> wrote:
>
> [trimmed]
>
>  > Not sure what kernel. If still pre 5.2 boot with  i915.alpha_support=1 kernel parameter.
>
> fc30 is on a decently recent kernel:
>          Linux e7.eyal.emu.id.au <http://e7.eyal.emu.id.au> 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
>
> -- 
> Eyal at Home ([e-mail] <mailto:[e-mail]>)
> _______________________________________________
>
> OK , another shot in the dark. CPU Temperature.

CPU temps are monitored/logged and there is no indication of a problem.

Next time this happens I will save Xorg.0.log and compare it to a "good" one.

[Anthony F McInerney]

On Fri, 3 Apr 2020 at 22:32,  wrote:
> On 2020-04-04 02:57, Anthony F McInerney wrote:
> > On Fri, 3 Apr 2020 at 04:30, <[e-mail] <mailto:
>
> [e-mail]>> wrote:
> > On 2020-04-03 13:50, Anthony F McInerney wrote:
> >  > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:
>
> [e-mail]> <mailto:[e-mail] >> wrote:
> > [trimmed]
> >
> >  > Not sure what kernel. If still pre 5.2 boot
>
> with  i915.alpha_support=1 kernel parameter.
> > fc30 is on a decently recent kernel:
> >          Linux e7.eyal.emu.id.au <http://e7.eyal.emu.id.au>
>
> 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64
> x86_64 GNU/Linux
> > --
> > Eyal at Home ([e-mail] <mailto:[e-mail]>)
> > _______________________________________________
> >
> > OK , another shot in the dark. CPU Temperature.
>
> CPU temps are monitored/logged and there is no indication of a problem.
>
> Next time this happens I will save Xorg.0.log and compare it to a "good"
> one.
>
> Ah!. Another thought - Have you turned off the XFCE Compositor?  Settings
> Window Manager Tweaks > Compositing > Untick

On 2020-04-04 10:31, Anthony F McInerney wrote:
> On Fri, 3 Apr 2020 at 22:32, <[e-mail] > wrote:
> On 2020-04-04 02:57, Anthony F McInerney wrote:
>  >
>  >
>  > On Fri, 3 Apr 2020 at 04:30, <[e-mail] <mailto:[e-mail]> <mailto:[e-mail] <mailto:[e-mail]>>> wrote:
>  >
>  >     On 2020-04-03 13:50, Anthony F McInerney wrote:
>  >      > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:[e-mail]> <mailto:[e-mail] <mailto:[e-mail]>> <mailto:[e-mail] <mailto:[e-mail]> <mailto:[e-mail] <mailto:[e-mail]>>>> wrote:
>  >
>  >     [trimmed]
>  >
>  >      > Not sure what kernel. If still pre 5.2 boot with  i915.alpha_support=1 kernel parameter.
>  >
>  >     fc30 is on a decently recent kernel:
>  >              Linux e7.eyal.emu.id.au <http://e7.eyal.emu.id.au> <http://e7.eyal.emu.id.au> 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
>  >
>  >     --
>  >     Eyal at Home ([e-mail] <mailto:[e-mail]> <mailto:[e-mail] <mailto:[e-mail]>>)
>  >     _______________________________________________
>  >
>  > OK , another shot in the dark. CPU Temperature.
>
> CPU temps are monitored/logged and there is no indication of a problem.
>
> Next time this happens I will save Xorg.0.log and compare it to a "good" one.
>
>
> Ah!. Another thought - Have you turned off the XFCE Compositor?  Settings > Window Manager Tweaks > Compositing > Untick

Did not visit those settings for a long while. Yes, the compositor is not enabled.

[Patrick O'Callaghan]

On Sat, 2020-04-04 at 00:31 +0100, Anthony F McInerney wrote:
> On Fri, 3 Apr 2020 at 22:32,  wrote:
> > On 2020-04-04 02:57, Anthony F McInerney wrote:
> > > On Fri, 3 Apr 2020 at 04:30, <[e-mail] <mailto:
> >
> > [e-mail]>> wrote:
> > > On 2020-04-03 13:50, Anthony F McInerney wrote:
> > >  > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:
> >
> > [e-mail]> <mailto:[e-mail] >> wrote:
> > > [trimmed]
> > >
> > >  > Not sure what kernel. If still pre 5.2 boot
> >
> > with  i915.alpha_support=1 kernel parameter.
> > > fc30 is on a decently recent kernel:
> > >          Linux e7.eyal.emu.id.au <http://e7.eyal.emu.id.au>
> >
> > 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64
> > x86_64 GNU/Linux
> > > --
> > > Eyal at Home ([e-mail] <mailto:[e-mail]>)
> > > _______________________________________________
> > >
> > > OK , another shot in the dark. CPU Temperature.
> >
> > CPU temps are monitored/logged and there is no indication of a problem.
> >
> > Next time this happens I will save Xorg.0.log and compare it to a "good"
> > one.
> >
> > Ah!. Another thought - Have you turned off the XFCE Compositor?  Settings
> > Window Manager Tweaks > Compositing > Untick

Please fix your quoting style. You appear to be quoting your own
comment, making it very easy to miss.

poc

[Anthony F McInerney]

On Sun, 5 Apr 2020 at 00:00, Stephen Morris 
wrote:
> On 3/4/20 1:31 pm, [e-mail] wrote:
> > In case this matters - the system runs in 4k (3840x2160@30) mode which
> > is on spec for the mobo.
>
> Just out of curiosity, are you sure you are using X and not Wayland? I
> am running F31 in a vm under Windows 10, and when I use Gnome under
> Wayland with the screen in the equivalent of 3840x2160 I get double
> overlays in windows when expanded past a certain size, which was
> initially highlighted when I ran with windows maximized to 3840x2160,
> but this issue did not occur in Gnome running on X, and did not occur in
> KDE.
> Just one further question, are you able to increase the refresh rate and
> see if that makes a difference? I run my system in 3840x2160@60 mode
> when running X (Wayland scaled, X didn't) by adding a file into
> /etc/X11/xorg.conf.d specifying the relevant modeline to run X in that
> mode.
>
> regards,
> Steve

Just to move along the troubleshooting, it's lxdm with XFCE. no chance of
wayland there.
It's a good point though, that the next steps for this should be:
Try awesomewm  or  gnome   or  another de/wm.
Try lightdm, gdm, etc.
Try wayland :D
Try different resolutions  / configurations as suggested above by Steve.
After all that, we should be in a better position to troubleshoot
further....

[Stephen Morris]

On 3/4/20 1:31 pm, [e-mail] wrote:
> In case this matters - the system runs in 4k (3840x2160@30) mode which 
> is on spec for the mobo.

Just out of curiosity, are you sure you are using X and not Wayland? I 
am running F31 in a vm under Windows 10, and when I use Gnome under 
Wayland with the screen in the equivalent of 3840x2160 I get double 
overlays in windows when expanded past a certain size, which was 
initially highlighted when I ran with windows maximized to 3840x2160, 
but this issue did not occur in Gnome running on X, and did not occur in 
KDE.
Just one further question, are you able to increase the refresh rate and 
see if that makes a difference? I run my system in 3840x2160@60 mode 
when running X (Wayland scaled, X didn't) by adding a file into 
/etc/X11/xorg.conf.d specifying the relevant modeline to run X in that mode.

regards,
Steve

[Stephen Morris]

On 4/4/20 8:02 pm, Patrick O'Callaghan wrote:
> On Sat, 2020-04-04 at 00:31 +0100, Anthony F McInerney wrote:
> > On Fri, 3 Apr 2020 at 22:32,  wrote:
> > > On 2020-04-04 02:57, Anthony F McInerney wrote:
> > > > On Fri, 3 Apr 2020 at 04:30, <[e-mail] <mailto:
> > >
> > > [e-mail]>> wrote:
> > > >  On 2020-04-03 13:50, Anthony F McInerney wrote:
> > > >   > On Thu, 2 Apr 2020 at 22:52, <[e-mail] <mailto:
> > >
> > > [e-mail]> <mailto:[e-mail] >> wrote:
> > > >  [trimmed]
> > > >
> > > >   > Not sure what kernel. If still pre 5.2 boot
> > >
> > > with  i915.alpha_support=1 kernel parameter.
> > > >  fc30 is on a decently recent kernel:
> > > >           Linux e7.eyal.emu.id.au <http://e7.eyal.emu.id.au>
> > >
> > > 5.5.10-100.fc30.x86_64 #1 SMP Wed Mar 18 14:34:46 UTC 2020 x86_64 x86_64
> > > x86_64 GNU/Linux
> > > >  --
> > > >  Eyal at Home ([e-mail] <mailto:[e-mail]>)
> > > >  _______________________________________________
> > > >
> > > > OK , another shot in the dark. CPU Temperature.
> > >
> > > CPU temps are monitored/logged and there is no indication of a problem.
> > >
> > > Next time this happens I will save Xorg.0.log and compare it to a "good"
> > > one.
> > >
> > > Ah!. Another thought - Have you turned off the XFCE Compositor?  Settings
> > > Window Manager Tweaks > Compositing > Untick
>
> Please fix your quoting style. You appear to be quoting your own
> comment, making it very easy to miss.

Hi patrick, just one question, what mail package are you using? I'm 
using Thunderbird Daily and as displayed to me his comments display 
unquoted in exactly the same way as your comments are unquoted.

regards,
Steve
> poc
> _______________________________________________
> users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]

On 2020-04-05 09:59, Stephen Morris wrote:
> On 3/4/20 1:31 pm, [e-mail] wrote:
> > In case this matters - the system runs in 4k (3840x2160@30) mode which is on spec for the mobo.
>
> Just out of curiosity, are you sure you are using X and not Wayland? I am running F31 in a vm under Windows 10, and when I use Gnome under Wayland with the screen in the equivalent of 3840x2160 I get double overlays in windows when expanded past a certain size, which was initially highlighted when I ran with windows maximized to 3840x2160, but this issue did not occur in Gnome running on X, and did not occur in KDE.
> Just one further question, are you able to increase the refresh rate and see if that makes a difference? I run my system in 3840x2160@60 mode when running X (Wayland scaled, X didn't) by adding a file into /etc/X11/xorg.conf.d specifying the relevant modeline to run X in that mode.
>
> regards,
> Steve

$ ps aux|grep X
root        3108  4.5  1.3 1387896 430160 tty1   Ssl+ Apr04  67:48 /usr/libexec/Xorg -background none :0 vt01 -nolisten tcp -novtswitch -auth /var/run/lxdm/lxdm-:0.auth
$ ls -l /var/log/Xorg.0.log*
-rw-r--r-- 1 root root 257217 Apr  5 07:57 /var/log/Xorg.0.log
-rw-r--r-- 1 root root  53570 Apr  4 09:32 /var/log/Xorg.0.log.old

[Anthony F McInerney]

On Sun, 5 Apr 2020 at 00:40, Anthony F McInerney  wrote:
> On Sun, 5 Apr 2020 at 00:00, Stephen Morris 
> wrote:
> > On 3/4/20 1:31 pm, [e-mail] wrote:
> > > In case this matters - the system runs in 4k (3840x2160@30) mode which
> > > is on spec for the mobo.
> >
> > Just out of curiosity, are you sure you are using X and not Wayland? I
> > am running F31 in a vm under Windows 10, and when I use Gnome under
> > Wayland with the screen in the equivalent of 3840x2160 I get double
> > overlays in windows when expanded past a certain size, which was
> > initially highlighted when I ran with windows maximized to 3840x2160,
> > but this issue did not occur in Gnome running on X, and did not occur in
> > KDE.
> > Just one further question, are you able to increase the refresh rate and
> > see if that makes a difference? I run my system in 3840x2160@60 mode
> > when running X (Wayland scaled, X didn't) by adding a file into
> > /etc/X11/xorg.conf.d specifying the relevant modeline to run X in that
> > mode.
> >
> > regards,
> > Steve
>
> Just to move along the troubleshooting, it's lxdm with XFCE. no chance of
> wayland there.
> It's a good point though, that the next steps for this should be:
> Try awesomewm  or  gnome   or  another de/wm.
> Try lightdm, gdm, etc.
> Try wayland :D
> Try different resolutions  / configurations as suggested above by Steve.
> After all that, we should be in a better position to troubleshoot
> further....

OK, at that the top of the list should be Try as a new user with fresh
config.

[Tim]

On Sun, 2020-04-05 at 10:03 +1000, Stephen Morris wrote:
> Hi patrick, just one question, what mail package are you using? I'm 
> using Thunderbird Daily and as displayed to me his comments display 
> unquoted in exactly the same way as your comments are unquoted.

I could see he was using Evolution, it's in the headers:
User-Agent: Evolution 3.34.4 (3.34.4-1.fc31)

I'm using Evolution 3.28.5 (3.28.5-5.el7)

There are a number of things that fool mail clients into joining
replies in with the quotes.  One of the main ones is when just start
typing replies in the middle of quotes.  Another is when people start
replying immediately below a quote without adding a blank line between
them.

Thunderbird is particularly hideous at quoting, especially with plain
text.  You see this smattering of variable amounts of blank spaces
between the quote prefix indicators (either > or | symbols).  HTML mail
ought to be able to do quoting better, simply because there are tags
actually marking where a quote starts and ends, yet HTML mailers still
do a diabolical job at quoting.

Whenever I reply to an email, it's almost guaranteed that I will have
to hand-edit every line to turn a jumbled mess into something that's
easy to read.

For a very long time, about the only way to do neat quoting is to jam
all the quote symbols to the left, with no blank spaces before any of
them, and one blank space to the right of the last one.  Do anything
else, and it becomes an eyesore.  I wish mail programmers would get
their act together, they've had decades to learn what doesn't work.

Good example:
> > > > oldest quote of a prior message, with several lines of text
> > > > where each line is neatly wrapped AFTER the damn quote
> > > > indicators, not in the middle of them
> > > next oldest quote
> > > replying to the previous
> > > messages
> > then the next
> and the last

Shitty quoting example:
> > > >  > old quote
> > >
> > > | > oldish quote

}| a reply, maybe the latest, but you can't tell
> > > || oldish quote

I've seen very few mail (or news clients) that could do decent quoting
(or even typing of your own message), none on Linux.  There was Thor on
the Amiga, eventually YAM got better.  The Bat! and Forte Agent on
Windows.  PINE could do it quite well, but it was a text-only system
that was a nightmare to use in other ways.