Bug#803667: upgrade-reports: No Xorg: "no screens found(EE)"

[Niels Thykier <niels@thykier.net>]

Ray Andrews:
> 
> Package: upgrade-reports
> Severity: important
> 
> Dear Maintainer,
> 
> [...]
> 
> I track 'testing' and upgrade every few days, almost always without any
> issues.  However a couple of weeks ago the upgrade caused my Xorg to
> fail with the above message.  Looking at Xorg.0.log, comparing a good
> version (running a backup) with the failed upgrade, the first sign of
> trouble is the message: "failed to set drm version".
> 
> lspci reports my card:
> NVIDIA Corporation GF119 [GeForce GT 610] (rev a1)
> 
> I use the nouveau driver. I have an Xorg.conf, but it works fine prior
> to the upgrade.  Removing Xorg.conf made no difference (I need it to get
> my dual monitors working).  I tried reinstalling every package that has
> 'drm' in its name with no change.  If it is relevant, recent efforts at
> upgrades on the broken install (I have expected that this bug would fix
> itself after a few subsequent upgrades) report something to the effect
> that the signature of the upgrade has not been updated--or something
> like that.
> 
> 

Hi Ray,

Are you using the setuid version of X11 or the new non-setuid version?
And in the latter case, do you have libpam-systemd installed?

Possibly related information:
> xorg-server (2:1.17.3-1) unstable; urgency=medium
> 
>   The Xorg server is no longer setuid root by default.  This change
> reduces the
>   risk of privilege escalation due to X server bugs, but has some side
> effects:
> 
>   * it relies on logind and libpam-systemd
>   * it relies on a kernel video driver (so the userspace component doesn't
>     touch the hardware directly)
>   * it needs X to run on the virtual console (VT) it was started from
>   * it changes the location for storing the Xorg log from /var/log/ to
>     ~/.local/share/xorg/
> 
>   On systems where those are not available, the new xserver-xorg-legacy
> package
>   is needed to allow X to run with elevated privileges.  See the
>   Xwrapper.config(5) manual page for configuration details.
> 
>  -- Julien Cristau <jcristau@debian.org>  Tue, 27 Oct 2015 22:54:11 +0000


Thanks,
~Niels