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

[Luis Mochan]

Hi Luca,

On Mon, Aug 15, 2016 at 10:10:29PM +0100, Luca Boccassi wrote:
> Control: severity -1 important
> Control: tags -1 moreinfo
> ...
> 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.
OK. It is critical for me though... 
> 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

Should there? 

> video:x:44:mochan,david,luquesnel,elias,gatis,david,irina
> 
> Is your user one of those listed in the "video" group?

Yes. Nevertheless, I don't even get to the login screen, so the
problem appears before I'm become user.  I tried adding lightdm to the
group video, but it didnt work either.

> What is the output of "getfacl /dev/dri/card0"?

mochan at fmunu:~$ getfacl /dev/dri/card0
getfacl: Removing leading '/' from absolute path names
# file: dev/dri/card0
# owner: root
# group: video
user::rw-
group::rw-
other::---

> Are you running systemd + logind?

Running ps -e returns the lines:

mochan at fmunu:~$ ps -e|grep systemd
  862 ?        00:00:00 systemd-udevd
 4288 ?        00:00:00 systemd-logind
but the program with pid=1 is init.
Is there another test to better find out?

Thanks and best regards,
Luis


-- 

                                                                  o
W. Luis Mochán,                      | tel:(52)(777)329-1734     /<(*)
Instituto de Ciencias Físicas, UNAM  | fax:(52)(777)317-5388     `>/   /\
Apdo. Postal 48-3, 62251             |                           (*)/\/  \
Cuernavaca, Morelos, México          | mochan at fis.unam.mx   /\_/\__/
GPG: 791EB9EB, C949 3F81 6D9B 1191 9A16  C2DF 5F0A C52B 791E B9EB