Adding mesa@packages to Cc since I suspect #775235 needs reassigning to Mesa, perhaps along with its merged bugs #770130, #776911.
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!". See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775235#10 for full backtrace. The merged bug #770130 is that gnome-shell crashes on an unknown i386 (probably relatively old, since it has 82830M/MG integrated graphics, which Wikipedia says is a Pentium III-M chipset) with "Cogl-ERROR **: Failed to create texture 2d due to size/format constraints". Oddly, this only happens for non-power-of-two textures in the gnome-shell run by the actual user, not by the gnome-shell used for the gdm login prompt (even though both use non-power-of-two textures). Michael Gilbert merged this with #775235 and #776911 without comment; I'm not sure of the reasoning for believing that #775235 and #770130 is the same thing. 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. On Sat, 21 Feb 2015 at 21:46:01 -0500, Michael Gilbert wrote: > On Fri, Feb 6, 2015 at 1:20 PM, Simon McVittie wrote: > > Michael, I see you've found a solution or workaround: is there > > anything you'd like Rafal to try? > > Try gnome-shell built with llvm-3.4 instead of 3.5. gnome-shell doesn't build-depend on any llvm version so I don't think that's going to make any difference. Do you mean mesa built with llvm-3.4 instead of 3.5, as seen in <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775235#15>? Looking at the Ubuntu changelog, it seems that they rebuilt mesa with llvm-3.5, then reverted to llvm-3.4 because "too many regressions" (e.g. https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.5/+bug/1360241), but then switched to llvm-3.6 for Mesa 10.4 in 15.04/vivid. Mesa 10.4.2 seems to have been accidentally uploaded to unstable instead of experimental. I infer from the git repository that 10.3.2 (via t-p-u) is still the version targeted for jessie: is this correct? Would use of llvm-3.4 for jessie be acceptable to the Mesa maintainers? According to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775235#15 that fixes at least one of these merged bugs, perhaps all three. Alternatively, would it be useful information for the Mesa maintainers if people tried Mesa 10.4.2 on affected systems? #775235 should be easy to reproduce on an i386 VM on an amd64 host (I assume that's how Steve did the original failed test), but #770130 and #776911 seem to require access to real hardware. I have a Pentium IV system which I might be able to resurrect if that would help, although if the relevant CPU feature is SSE2, I think that's too new. S -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
