Setting default Xsession on Fedora 25

[Laverne Schrock]

Hi,

I'm using GDM on Fedora 25 and want to change the default graphical
session that is used. The "built in" default session is the "Gnome"
session, but I want the default session to be the "Gnome Xorg"
session.

I have added DefaultSession=gnome-xorg.desktop and WaylandEnable=false
to the [daemon] section of /etc/gdm/custom.conf as recommend here:
https://ask.fedoraproject.org/en/question/96134/how-can-i-set-xorg-as-a-defa...

I have also deleted all the contents of /var/lib/AccountsService/users
so that no per-user defaults cause problems.

Here is what happens. I boot up the computer, type in my username, hit
enter, and type in my password. Before I proceed, I check which
session is going to be used. "Gnome" is the one selected on the list.
I proceed anyway. After login, I see that Xorg is running, NOT
Xwayland.

I log out, and the go to log back in. I check the list again, and
"Gnome" is still selected. This time when I log in, Xwayland is
running. Huh? If I manually select the "Gnome Xorg" entry, I get what
I expect and my preference will be saved, but I want to set the
default for all users.

Am I doing something wrong or does this seem like a bug? If it is a
bug, I don't know which package it actually belongs to.

Thanks,
Laverne Schrock

P.S.

My graphics card:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor
Integrated Graphics Controller (rev 12)

[Ed Greshko]

On 03/04/17 11:25, Laverne Schrock wrote:
> Hi,
>
> I'm using GDM on Fedora 25 and want to change the default graphical
> session that is used. The "built in" default session is the "Gnome"
> session, but I want the default session to be the "Gnome Xorg"
> session.
>
> I have added DefaultSession=gnome-xorg.desktop and WaylandEnable=false
> to the [daemon] section of /etc/gdm/custom.conf as recommend here:
> https://ask.fedoraproject.org/en/question/96134/how-can-i-set-xorg-as-a-defa...
>
> I have also deleted all the contents of /var/lib/AccountsService/users
> so that no per-user defaults cause problems.
>
> Here is what happens. I boot up the computer, type in my username, hit
> enter, and type in my password. Before I proceed, I check which
> session is going to be used. "Gnome" is the one selected on the list.
> I proceed anyway. After login, I see that Xorg is running, NOT
> Xwayland.
>
> I log out, and the go to log back in. I check the list again, and
> "Gnome" is still selected. This time when I log in, Xwayland is
> running. Huh? If I manually select the "Gnome Xorg" entry, I get what
> I expect and my preference will be saved, but I want to set the
> default for all users.
>
> Am I doing something wrong or does this seem like a bug? If it is a
> bug, I don't know which package it actually belongs to.

I use KDE and sddm.....   But....

Looking at /etc/gdm/custom.conf  I see the lines

# Uncoment the line below to force the login screen to use Xorg
#WaylandEnable=false

I'd give un-commenting and restarting gdm a try.

[Laverne Schrock]

On Fri, Mar 3, 2017 at 9:41 PM, Ed Greshko  wrote:
> On 03/04/17 11:25, Laverne Schrock wrote:
> > Hi,
> >
> > I'm using GDM on Fedora 25 and want to change the default graphical
> > session that is used. The "built in" default session is the "Gnome"
> > session, but I want the default session to be the "Gnome Xorg"
> > session.
> >
> > I have added DefaultSession=gnome-xorg.desktop and WaylandEnable=false
> > to the [daemon] section of /etc/gdm/custom.conf as recommend here:
> > https://ask.fedoraproject.org/en/question/96134/how-can-i-set-xorg-as-a-defa...
> >
> > I have also deleted all the contents of /var/lib/AccountsService/users
> > so that no per-user defaults cause problems.
> >
> > Here is what happens. I boot up the computer, type in my username, hit
> > enter, and type in my password. Before I proceed, I check which
> > session is going to be used. "Gnome" is the one selected on the list.
> > I proceed anyway. After login, I see that Xorg is running, NOT
> > Xwayland.
> >
> > I log out, and the go to log back in. I check the list again, and
> > "Gnome" is still selected. This time when I log in, Xwayland is
> > running. Huh? If I manually select the "Gnome Xorg" entry, I get what
> > I expect and my preference will be saved, but I want to set the
> > default for all users.
> >
> > Am I doing something wrong or does this seem like a bug? If it is a
> > bug, I don't know which package it actually belongs to.
>
> I use KDE and sddm.....   But....
>
> Looking at /etc/gdm/custom.conf  I see the lines
>
> # Uncoment the line below to force the login screen to use Xorg
> #WaylandEnable=false
>
> I'd give un-commenting and restarting gdm a try.

Thanks for the suggestion, but as I mentioned, I have that flag
present. This flag actually controls whether GDM uses Wayland for
itself and has no impact on what the actual sessions it launches use.

[Ed Greshko]

On 03/04/17 11:48, Laverne Schrock wrote:
> Thanks for the suggestion, but as I mentioned, I have that flag
> present. This flag actually controls whether GDM uses Wayland for
> itself and has no impact on what the actual sessions it launches use.

Sorry about that.....  Not sure how I missed your having noted
that.....   Maybe I'll switch one of my systems to use GDM to test.

[Ed Greshko]

On 03/04/17 11:25, Laverne Schrock wrote:
> Here is what happens. I boot up the computer, type in my username, hit
> enter, and type in my password. Before I proceed, I check which
> session is going to be used. "Gnome" is the one selected on the list.
> I proceed anyway. After login, I see that Xorg is running, NOT
> Xwayland.
>
> I log out, and the go to log back in. I check the list again, and
> "Gnome" is still selected. This time when I log in, Xwayland is
> running. Huh? If I manually select the "Gnome Xorg" entry, I get what
> I expect and my preference will be saved, but I want to set the
> default for all users.
>
> Am I doing something wrong or does this seem like a bug? If it is a
> bug, I don't know which package it actually belongs to.

OK....  I switched a system to use gdm.

I did not delete the info in AccountsServices.  Using my wife's account
I see this in the users file...

[egreshko@acer users]$ cat maria
[User]
Language=
XSession=gnome
SystemAccount=false

I then login after switching to 'GNOME on Xorg" and the file changes to
now...

[egreshko@acer users]$ cat maria
[User]
Language=
XSession=gnome-xorg
SystemAccount=false

I logout and then go to login and the selection is still set to 'GNOME
on Xorg"

I would have thought the intention of adding WaylandEnable=false would
remove Wayland as an option.

If you only use GNOME on the system and you have a limited number of
users...  One thing you could try would be to create a
/var/lib/AccountsService/users file for each user with
XSession=gnome-xorg set and remove change the permissions on the file to
-r--r--r--

[Ed Greshko]

On 03/04/17 12:40, Ed Greshko wrote:
> If you only use GNOME on the system and you have a limited number of
> users...  One thing you could try would be to create a
> /var/lib/AccountsService/users file for each user with
> XSession=gnome-xorg set and remove change the permissions on the file to
> -r--r--r--

Ahhh....  That doesn't work.   The display manager restarts and restores write permission....

[Laverne Schrock]

On Fri, Mar 3, 2017 at 10:46 PM, Ed Greshko  wrote:
> On 03/04/17 12:40, Ed Greshko wrote:
> > If you only use GNOME on the system and you have a limited number of
> > users...  One thing you could try would be to create a
> > /var/lib/AccountsService/users file for each user with
> > XSession=gnome-xorg set and remove change the permissions on the file to
> > -r--r--r--
>
> Ahhh....  That doesn't work.   The display manager restarts and restores write permission....

Due to the number of users, and the number of machines I'm dealing
with, manually setting those files won't really work for me.

However, if one wanted to prevent those files from being changed, one
could probably use ACLs or SELinux policies to enforce that. :)

[Ed Greshko]

On 03/04/17 11:25, Laverne Schrock wrote:
> Am I doing something wrong or does this seem like a bug? If it is a
> bug, I don't know which package it actually belongs to.

FWIW, I think you should file a bug....

Looking at https://fedoraproject.org/wiki/Changes/WaylandByDefault and
the "How to Test" section I see....

Change the gdm configuration by adding WaylandEnable=false and reboot
Verify that the login screen comes up under X
Verify that only X-based sessions are offered in the session chooser

And that isn't the case...

[Matthew Miller]

On Sat, Mar 04, 2017 at 08:12:59AM -0600, Laverne Schrock wrote:
> > > /var/lib/AccountsService/users file for each user with
> >
> > Ahhh....  That doesn't work.   The display manager restarts and
> > restores write permission....
>
> However, if one wanted to prevent those files from being changed, one
> could probably use ACLs or SELinux policies to enforce that. :)

Or the sysadmin's hammer, `chattr -i`.

[Stephen Morris]

On 04/03/2017 13:25, Laverne Schrock wrote:
> Hi,
>
> I'm using GDM on Fedora 25 and want to change the default graphical
> session that is used. The "built in" default session is the "Gnome"
> session, but I want the default session to be the "Gnome Xorg"
> session.
>
> I have added DefaultSession=gnome-xorg.desktop and WaylandEnable=false
> to the [daemon] section of /etc/gdm/custom.conf as recommend here:
> https://ask.fedoraproject.org/en/question/96134/how-can-i-set-xorg-as-a-defa...
>
> I have also deleted all the contents of /var/lib/AccountsService/users
> so that no per-user defaults cause problems.
>
> Here is what happens. I boot up the computer, type in my username, hit
> enter, and type in my password. Before I proceed, I check which
> session is going to be used. "Gnome" is the one selected on the list.
> I proceed anyway. After login, I see that Xorg is running, NOT
> Xwayland.
>
> I log out, and the go to log back in. I check the list again, and
> "Gnome" is still selected. This time when I log in, Xwayland is
> running. Huh? If I manually select the "Gnome Xorg" entry, I get what
> I expect and my preference will be saved, but I want to set the
> default for all users.

How do you check which Gnome session is running, Gnome-Wayland or 
Gnome-Xorg? I am using the proprietary Nvidia driver which runs with 
either Wayland or Xorg.

I have one issue with this process, if I logout and select Gnome-Xorg 
from GDM then Gnome starts quite happily and the logout and restart can 
be issued as many times as I like. If I select Gnome and login after 
booting my machine it starts Gnome quite happily, if I logout and leave 
the selection at Gnome and log back in, Gnome refuses to start until I 
reboot. If I login with Gnome and logout, then select Gnome-Xorg and 
login that starts Gnome quite happily, if I then logout and select Gnome 
again that refuses to start Gnome until I reboot as well.
I have checked this with other users by trying to login with Gnome 
selected and that refuses to start Gnome as well. Also if I login with 
Gnome, logout, login with Plasma selected which starts KDE, logout, and 
select Gnome and attempt to login that refuses to start Gnome as well.

My understanding is that selecting Gnome starts Gnome with Wayland not 
Xorg, hence the Gnome-Xorg entry. If I am correct then I suspect the 
issues you are querying and the issues I am having are a bug in Wayland.

regards,
Steve
> Am I doing something wrong or does this seem like a bug? If it is a
> bug, I don't know which package it actually belongs to.
>
> Thanks,
> Laverne Schrock
>
> P.S.
>
> My graphics card:
> $ lspci | grep VGA
> 00:02.0 VGA compatible controller: Intel Corporation Core Processor
> Integrated Graphics Controller (rev 12)
> _______________________________________________
> users mailing list [e-mail]
> To unsubscribe send an email [e-mail]

[Ed Greshko]

On 03/06/17 04:36, Stephen Morris wrote:
> How do you check which Gnome session is running, Gnome-Wayland or
> Gnome-Xorg? I am using the proprietary Nvidia driver which runs with
> either Wayland or Xorg.

I believe both these ways should work...

In a terminal enter

gsettings set org.gtk.Settings.Debug enable-inspector-keybinding true
then type Control-Shift-I.  The go to the "Help" menu and select
"Inspector".  Navigate to the "General" tab and look at the GDK Backend
entry

or

In a terminal enter

env | grep DISPLAY

[Ben]

On Sun, Mar 5, 2017 at 5:36 PM, Ed Greshko  wrote:
> On 03/06/17 04:36, Stephen Morris wrote:
> > How do you check which Gnome session is running, Gnome-Wayland or
> > Gnome-Xorg? I am using the proprietary Nvidia driver which runs with
> > either Wayland or Xorg.
>
> I believe both these ways should work...
>
> In a terminal enter
>
> gsettings set org.gtk.Settings.Debug enable-inspector-keybinding true
> then type Control-Shift-I.  The go to the "Help" menu and select
> "Inspector".  Navigate to the "General" tab and look at the GDK Backend
> entry
>
> or
>
> In a terminal enter
>
> env | grep DISPLAY

You can also use loginctl show-session <session_number>

for seat in $(loginctl list-sessions | grep <user> | grep seat | awk
'{print $1}')
do
     loginctl show-session $seat | grep Type
done