** Description changed:
I tried both nouveau and nvidia-340 drivers. It used to work at least by
the latter one in Xubuntu 18.04, even with HWE kernel
When using the nvidia-340 driver:
$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1200,
Related question: https://askubuntu.com/q/1370465/21005
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https://bugs.launchpad.net/bugs/1946987
Title:
Nvidia 340 Xorg driver is installed but not loaded after OS upgrade
To manage
Maybe lightdm could do something differently? What causes HDMI to appear
when I log out of session?
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Title:
Nvidia 340 Xorg driver is installed
** Summary changed:
- Nvidia 340 Xorg driver is installed but not loaded
+ Nvidia 340 Xorg driver is installed but not loaded after OS upgrade
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** Description changed:
I tried both nouveau and nvidia-340 drivers. It used to work at least by
the latter one in Xubuntu 18.04, even with HWE kernel
When using the nvidia-340 driver:
$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1200,
"Report problem..." creates a new bug, as you should for each .crash
file.
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Title:
Nvidia 340 Xorg driver is installed but not loaded
To manage
What does the "Report problem..." button in the dialog do, then if I
have to use command line to report the crash files?
I see "sudo nvidia-xconfig" generates some basic /etc/X11/xorg.conf
file.
Regardless, I noted the following:
If I log out from the Xfce session back to the LightDM greeter
Please use the 'ubuntu-bug' tool to report each of those crash files. If
'ubuntu-bug' doesn't work then you can use 'apport-cli'.
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Title:
Nvidia
I would try this on the non-working system:
sudo nvidia-xconfig
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Title:
Nvidia 340 Xorg driver is installed but not loaded
To manage
BTW after every boot I see "System program problem detected?" dialog and
every time I choose "Report problem...". I booted today, too.
$ LC_ALL=C ls -l /var/crash/
total 4624
-rw-r- 1 jarnos whoopsie 1416740 Oct 14 11:05
_usr_bin_xfce4-power-manager.1000.crash
-rw-r- 1 root whoopsie
The differences (in my experience) are mostly:
1. Personal config files in $HOME (filenames and directories usually
starting with a dot, so are hidden)
2. System config files (like those for Xorg or Nvidia) in /etc/X11 or
/usr/share/X11/xorg.conf.d or other locations mentioned in the
Where can those differences be? I could compare to another machine with
the same driver. The graphics card is different, though.
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Title:
Nvidia
Yes it's always possible the upgrade process can give a different result
(and bugs compared) to that of a clean install.
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Title:
Nvidia 340 Xorg
Could there be something in upgrading process that caused this that
clean install wouldn't have done? Could the relevant parts be clean
installed now?
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One more thing. I get an error dialog after startup in the desktop. It
does not tell what went wrong, but it has an option to report to
developers and so I did.
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Hmm. I have another computer that is more successful with nvidia-340 in
Xubuntu 20.04. When I compare to Xorg.0.log files, I see differences
after line
"(II) systemd-logind: logind integration requires -keeptty and -keeptty
was not provided, disabling logind integration". The successful one has
Maybe I was misled by XorgLog.txt because "FBDEV" is actually the
correct driver to try if /dev/dri/card0 is missing (as it is when the
Nvidia kernel driver is loaded). So this might just be the *absence* of
a valid config file telling Xorg to load the nvidia driver. Try using
the 'nvidia-xconfig'
I searched for all .conf files in the device for "fbdev" (case
insensitive) and found these:
/usr/src/linux-headers-5.4.0-84-generic/include/config/auto.conf
CONFIG_XEN_FBDEV_FRONTEND=m CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_DRM_FBDEV_OVERALLOC=100
The broken config file you are looking for will mention "fbdev", but I'm
not sure where you will find it.
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Title:
Nvidia 340 Xorg driver is
There is no string "Default Screen Section" in
/usr/share/X11/xorg.conf.d directory.
The directory contains files: 10-amdgpu.conf
10-quirks.conf
10-radeon.conf
40-libinput.conf
51-synaptics-quirks.conf
70-synaptics.conf
70-wacom.conf
nvidia-drm-outputclass-ubuntu.conf
The last one is attached.
Your XorgLog.txt mentions that it's getting the problematic settings
like these from a config file somewhere:
[ 7.396] (**) |-->Screen "Default Screen Section" (0)
[ 7.396] (**) | |-->Monitor ""
...
[ 8.110] (**) FBDEV(1): claimed PCI slot 1@0:0:0
It also suggests to look in
I don't know if it is relevant, but even with Xubuntu 18.04 I had to
force pulseaudio sample rate to 44100 to be able to successfully play
sound via HDMI.
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** Description changed:
- I tried both nouveau and nvidia-340 deivers. It used to work at least by
+ I tried both nouveau and nvidia-340 drivers. It used to work at least by
the latter one in Xubuntu 18.04, even with HWE kernel
When using the nvidia-340 driver:
- $ xrandr
+ $ xrandr
There exists no /etc/X11/xorg.conf file. I already switched to nouveau
using "Software & Updates" rebooted, switched back to nvidia-340 by the
same application, and rebooted, but it did not help.
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