F33 just pretends to print
by Michael Hennebry
I have a Brother HL-L2360DL that I'd thought I'd finally managed to install.
I had to go to the Brother website to get a script to run.
The instructions for the script had the wrong name for it.
None of the default options for Brother printers came close.
The CUPS adminstration "web" pages say the right things:
Idle, accepting jobs, two completed jobs.
Nothing actually prints. Not even a test page.
The printer never comes out of deep sleep.
How do I fix this?
It worked with Centos 7, but I do not know what I did.
In my experience, there is no such thing as a small problem when it comes to
installing a printer on Linux:
Either it just works or it requires a mighty effort.
I am getting mighty tired of mighty efforts.
BTW how do I change the default from single- to double-sided?
--
Michael hennebry(a)web.cs.ndsu.NoDak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
-- someeecards
1 month, 1 week
cisco ise
by david richyad
cisco ise helps safeguard your business. It lets you control access throughout your network, see the user and device details, and stop/contain any threats. You can also use it to enforce security policies throughout your network. As a result, it helps prevent any technical issues and strengthens your cybersecurity measures. In short, you can manage your network security with more ease. Everything can be handled in one place, as opposed to needing multiple different applications open at once.
https://www.fieldengineer.com/blogs/cisco-ise-deployment-guide
3 months, 1 week
Improper shutdown, now Kernel panic.
by murph nj
Hi all:
I've got an odd problem that I was hoping for some help on.
The laptop was previously working fine, I am running F30, updated regularly.
I've got an Acer laptop that has been shutting down suddenly. (I
suspect a bad battery, working on that.)
After a sudden shutdown last night, I now get a kernel panic on boot
right after "Starting Switch Root..."
I was able to boot from a USB stick, and was able to read the journal,
but I didn't see anything obvious to help.
I was able to get all of my data off of the (encrypted) disks, so
that's not a problem, but I don't want to just give up, and wash and
reload too quickly.
Any suggestions?
Thanks,
--murph
3 months, 3 weeks
Xbox 360 controller on Fedora 32
by Greg Woods
It has been a couple of years (which means 4 or 5 Fedora releases ago)
since I did this, but I used to be able to play Xonotic using my Xbox 360
Wireless controller. Now I cannot get the controller to work properly in
F32 (it works in Windows 10 so I know the hardware is OK).
This most likely has something to do with the move from xboxdrv (which is
no longer available in Fedora) to xpad kernel driver, and/or the move from
the old js driver to evdev. The xpad driver comes with the current kernel,
but what I cannot figure out is how to calibrate the controller. If I run
Xontic with the controller connected, the game world just spins
counterclockwise. This is a symptom of the controller needing to be
calibrated, but I don't know how to do it. I tried using "jscal", but if I
run "jscal -c" to calibrate it, it appears to work but doesn't. I can
immediately run "jscal -t" and it will say it is not calibrated, and
running "jstest" also shows it is not calibrated (several of the axes are
not centered, i.e. show nonzero values in jstest).
I attempted to download and compile xboxdrv, but it does not work due to
Python 2 vs. 3 incompatibilities, and it doesn't look like any work has
been done on xboxdrv in quite some time. If I try to make it, I get this:
root@snowcrash xboxdrv-linux-0.8.8]# make
scons
scons: Reading SConscript files ...
File "/local/src/xboxdrv-linux-0.8.8/SConstruct", line 34
print target
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean
print(target)?
make: *** [Makefile:24: xboxdrv] Error 2
Certainly looks like Python version incompatibility.
Can anybody point me to information on how to use an Xbox 360 controller on
F32, or how to calibrate it when using the xpad driver? I have done a lot
of Googling, but most of the articles I found mention things like "apt-get
install xboxdrv", showing they were written for Ubuntu rather than Fedora
and are wanting to use the xboxdrv driver.
Thank you,
--Greg
1 year
btrfs system slow down with 100GB file
by Richard Shaw
I'm getting significant iowait while writing to a 100GB file. I have
already made it nocow by copying it to another directory, marking the
director nocow (+C) and using cat <oldfile> <newfile> to re-create it from
scratch.
I was under the impression that this should fix the problem.
On a tangent, it took about 30 minutes to delete the old file... My system
is a Ryzen 5 3600 w/ 16GB or memory but it is a spinning disk. I use an
NVME for the system and the spinning disk for /home.
Currently I'm getting random GUI freezes due to the iowait problem and my
HDD indicator light basically stays on solid for over an hour now.
Any tips?
Thanks,
Richard
1 year
What sets QT_IM_MODULE in F33?
by Robert G. (Doc) Savage
Using Fedora 33 with MATE desktop...
I'm working with the developer of a very handy RPN calculator app
called rpCalc to figure out why it doesn't work for my regular user
'doc' but works perfectly for a newly created user 'test'. The
developer strongly suspects a Qt5 setting. We have narrowed our search
to my local environment:
$ env | grep QT
QT_IM_MODULE=xim
QT_AUTO_SCREEN_SCALE_FACTOR=0
QT_SCALE_FACTOR=2
The developer believes the first (set to =xim) is causing rpCalc not to
function at all, and that the next two cause the font sizes on the
calculator buttons to be oversize.
I'm looking for one or more config files -- probably in my home
directory -- that set these variables. Talk about looking for a needle
in a haystack.
Is there a cat | grep command (or equiv) that can recursively look for
"QT" in all files in my home directory -- including hidden files? It
would have to be able to output the full path to any files in which
"QT" is found. Unfortunately cat does not support recursive searches.
--Doc Savage
Fairview Heights, IL
1 year, 1 month
Identifying what is accessing a USB device.
by Patrick O'Callaghan
I have an external USB-3 2-disk docking station, and a script which can
power up and down the drives as needed.
I have a systemd automount unit that correctly powers up the dock when
accessed, then mounts the drives (thanks Ed).
After an idle time, automount unmounts the drives. A script detects
when this happens and powers them down ... *at which point they
immediately power up again, and remain up until I intervene manually,
even though they are unmounted*.
This never happens if I run the script directly from the command line
(i.e. the drives power down and stay down).
Clearly the docking unit isn't just doing this flakily on its own.
Something is making it happen, and I've no idea how to discover what it
is except that it seems to be correlated with systemd in some way.
All of the above is 100% reproducible.
I'm open to suggestions if anyone has any ideas.
poc
1 year, 1 month
mdadm -> BTRFS conversion
by Patrick O'Callaghan
I currently have a pair of external drives configured as ext4 with
RAID1 using mdadm, and mainly used for backup. My / and /home
filesystems are now BTRFS so I'm looking at converting the external
drives to BTRFS with RAID1. My main reason is to take advantage of
BTRFS checksumming as a guard against bitrot, but I'd also like the
flexibility of setting up subvolumes with different properties (the
disks are currently 90% empty).
Any thoughts on this? What would be the simplest conversion strategy if
I go ahead?
poc
1 year, 1 month
Suggestion to improve documentation of
Changes/BtrfsTransparentCompression
by misterx42＠protonmail.com
Just a small thing, but as someone who never actually played around with filesystems so far, I was looking to try out the changes outlined in Changes/BtrfsTransparentCompression, but the command on the page:
btrfs filesystem defrag -czstd -r
doesnt work without an additional argument. This is pretty obvious for people who already worked with filesystems before, but I think it would be a good idea to add a small, one sentence explanation of how to add the required path to the end of the command (ie / in my case). It would help people like me from getting confused and hopefully bring in more casual tinkerers trying the new change out.
Thanks.
1 year, 1 month
