Bug#769072: Bug#769191: xorg: apt-get dist-upgrade somehow reconfigured my system to use the nvidia driver, even though I have no nvidia hardware

[Nathaniel Smith]

Here's my apt history files. history.log.1 has the big upgrade that
caused the problem; history.log has the mucking about I did to fix it.

Notice that the big upgrade got interrupted in the middle by libaudio2
failing to install (#768651), so there was some 'apt-get install -f'
and 'dpkg --configure -a' stuff in there before the dist-upgrade gets
restarted.

On Mon, Nov 17, 2014 at 9:26 PM, Simon McVittie <smcv at debian.org> wrote:
> On Wed, 12 Nov 2014 at 02:08:34 +0000, Nathaniel J. Smith wrote:
>> This evening I ran 'apt-get dist-upgrade' on my 'testing' system, rebooted, and
>> found the system unusable -- it just came up with gdm3's "Oh no! Something has
>> gone wrong!" screen.
>>
>> It turns out that the problem is that somehow, dist-upgrade reconfigured X to
>> use the nvidia drivers for GLX -- e.g., from /var/log/messages:
>> [...]
>> Nov 12 01:47:35 branna gdm-Xorg-:0[4239]: (EE) Failed to initialize GLX
>> extension (Compatible NVIDIA X driver not found)
>
> This sounds somewhat similar to #769072 (which is currently assigned to
> gnome-shell, and I only haven't reassigned it away because I'm not sure which
> nvidia-related package has the bug). The exact symptom is different,
> but the high-level situation ("trying to use a mixture of Mesa and nVidia
> GL stuff after an upgrade") is similar. Perhaps they should be merged?
>
> Finding the offending upgrade in /var/log/apt would be useful;
> so would the details of the apt transaction(s) in which you removed
> the nvidia stuff.
>
> Michael, I assume you have out-of-band information that says #769481 is
> in fact the same as #769191? (I ask because you merged them, but it isn't
> obvious why from the bug log.)
>
>     S



-- 
Nathaniel J. Smith
Postdoctoral researcher - Informatics - University of Edinburgh
http://vorpus.org
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