Bug#833895: nvidia-legacy-340xx-driver: blank screen after upgrade

[Luca Boccassi]

Control: severity -1 important
Control: tags -1 moreinfo

On Tue, 2016-08-09 at 22:09 -0500, Luis Mochan wrote:
> Package: nvidia-legacy-340xx-driver
> Version: 340.96-9
> Severity: grave
> Justification: renders package unusable
> 
> Dear Maintainer,
> 
> I upgraded my system today. I received a warning that the nvidia driver wouldn't work anymore with my old card 
> and that I should install the legacy-340xx package. After installation I chose the legacy package with the 
> updage-glx program. During installation I had some problems as I hadn't installed the appropriatte linux-headers
> package installed, but after I did, reinstalled the driver and booted the system I finally got to see the green NVIDIA 
> logo flash momentarily in my screen. But then, I get a blank screen and my laptop becomes unresponsive to its keyboard. 
> The system is running though, and I looged into it with ssh to write this message. 
> 
> Best regards,
> Luis

Hi,

I cannot reproduce on a fresh amd64 sid install with a gtx 780, so
downgrading severity as most likely cause is hardware or setup
dependent.

I notice in the device permissions that there is no user ACL bit set:

Device node permissions:
crw-rw---- 1 root video 226,   0 Aug  9 21:32 /dev/dri/card0
crw-rw-rw- 1 root root  195,   0 Aug  9 21:32 /dev/nvidia0
crw-rw-rw- 1 root root  195, 255 Aug  9 21:32 /dev/nvidiactl
video:x:44:mochan,david,luquesnel,elias,gatis,david,irina

Is your user one of those listed in the "video" group?
What is the output of "getfacl /dev/dri/card0"?
Are you running systemd + logind?

Kind regards,
Luca Boccassi
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