Bug#776911: gnome-shell: fails to start on i386 when [Mesa was] built with llvm-3.5

[Simon McVittie]

On 09/03/15 20:57, Julien Cristau wrote:
> On Thu, Feb 26, 2015 at 08:54:10 +0000, Simon McVittie wrote:
>> Context for Mesa maintainers: #775235 is that gnome-shell crashes in
>> an i386 VM with its default choice of emulated CPU, with
>> "LLVM ERROR: Do not know how to split the result of this operator!".
...
>> The merged bug #770130 is that gnome-shell crashes on an unknown i386
>> [...] with
>> "Cogl-ERROR **: Failed to create texture 2d due to size/format constraints".
>>
>> The other merged bug #776911 is that gnome-shell crashes on an
>> unknown i386 with "Cogl-ERROR **: Failed to create texture 2d due to
>> size/format constraints"; that looks like the same thing as #770130.
>
> Sounds like there are at least two different issues that should be
> split...

Perhaps. Michael, could you elaborate on your reasoning for believing
that #775235 (reproducible, in a VM, presumably with llvmpipe) is the
same bug as #770130 (on real hardware, seems to be with i915-family
graphics)?

#776911 (on real hardware, appears to be with i915-family graphics)
looks quite a lot like #770130: both involve Intel graphics chips
encountering a "pipe A underrun", and GNOME Shell crashing with
"Cogl-ERROR **: Failed to create texture 2d due to size/format constraints".

    S