Bug#893281: nvidia-driver: Hang after disabling output with xrandr

[Luca Boccassi]

On Sat, 2018-03-17 at 13:50 -0400, Gene Cash wrote:
> Package: nvidia-driver
> Version: 390.42-1
> Severity: normal
> 
> Dear Maintainer,
> 
> I upgraded the nvidia-driver package and all the required
> dependencies from 384.111-4 to 390.25-2, and now the X server hangs
> when disabling an output with xrandr.
> 
> I have two monitors, and I have an app that doesn't like multiple
> displays, so I disable one before running it.
> 
> I use "xrandr --output DVI-D-0 --off" and both the displays turn off,
> then the single monitor turns back on, (as normal) but the X server
> is frozen.
> 
> There is no mouse movement or keyboard input, and I ssh in and kill
> my window manager (FVWM) and X exits normally.
> 
> There are no errors in /var/log/messages or /var/log/Xorg.0.log
> 
> It doesn't matter if it's the primary display being turned off or
> not. I've tried both.
> 
> I also tried the latest version on sid (390.42-1) and it does it too.
> 
> If I downgrade back to 384.111-4, it works again.
> 
> I use "startx" to start the server.
> 
> I rebooted after upgrading to ensure the correct kernel module was
> loaded.
> 
> I have added /usr/share/X11/xorg.conf.d/rotate-nvidia.conf to rotate
> one of the monitors:
> # Rotate Samsung monitor to portrait and declare primary
> Section "Monitor"
>         Identifier  "DFP-4"
>         Option      "Rotate" "Left"
>         Option      "Primary" "true"
> EndSection
> 
> Here is the "xrandr" output:
> 
> Screen 0: minimum 8 x 8, current 3120 x 1920, maximum 32767 x 32767
> DVI-D-0 connected 1920x1200+1200+0 (normal left inverted right x axis
> y axis) 518mm x 324mm
>    1920x1200     59.95*+
>    1920x1080     59.93
>    1680x1050     59.95
>    1600x1200     60.00
>    1440x900      59.89
>    1360x768      60.02
>    1280x1024     60.02
>    1280x960      60.00
>    1280x720      60.00
>    1152x864      60.00
>    1024x768      75.03    70.07    60.00
>    800x600       75.00    72.19    60.32    56.25
>    640x480       75.00    72.81    59.94
> HDMI-0 disconnected (normal left inverted right x axis y axis)
> DP-0 disconnected (normal left inverted right x axis y axis)
> DP-1 disconnected (normal left inverted right x axis y axis)
> DVI-D-1 connected primary 1200x1920+0+0 left (normal left inverted
> right x axis y axis) 518mm x 324mm
>    1920x1200     59.95*+
>    1920x1080     60.00    50.00
>    1680x1050     59.95
>    1600x900      60.00
>    1440x900      59.89
>    1280x1024     60.02
>    1280x800      59.81
>    1280x720      60.00    50.00
>    1024x768      60.00
>    800x600       60.32    56.25
>    720x576       50.00
>    720x480       59.94
>    640x480       59.94
> 
> Please let me know if you need log files, more information, or want
> me to try anything.
> 
> -Gene Cash
> 

Hi,

This sounds like an upstream regression. The Nvidia driver is
proprietary and binary-only so there's little we can do I'm afraid.

I recommend to report the issue upstream, for example on the support
forum:

https://devtalk.nvidia.com/default/board/98/linux/

If you report back the link to the new thread I'll add it to the bug.

You can also report it via email to linux-bugs at nvidia.com

-- 
Kind regards,
Luca Boccassi
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