* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
@ 2018-08-22 5:16 ` bugzilla-daemon
2018-08-22 5:18 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
--- Comment #1 from Sergey Kondakov <virtuousfox@gmail.com> ---
Created attachment 141237
--> https://bugs.freedesktop.org/attachment.cgi?id=141237&action=edit
Xorg.0.log
Normal X log.
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
2018-08-22 5:16 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
--- Comment #2 from Sergey Kondakov <virtuousfox@gmail.com> ---
Created attachment 141238
--> https://bugs.freedesktop.org/attachment.cgi?id=141238&action=edit
Asus_F3Ke.dmesg
dmesg from affected machine.
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
2018-08-22 5:16 ` bugzilla-daemon
2018-08-22 5:18 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #141237|text/x-log |text/plain
mime type| |
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #141236|text/x-log |text/plain
mime type| |
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
` (3 preceding siblings ...)
2018-08-22 8:24 ` bugzilla-daemon
@ 2018-08-22 8:27 ` bugzilla-daemon
2018-08-27 14:47 ` bugzilla-daemon
2018-08-27 15:05 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |NOTOURBUG
Status|NEW |RESOLVED
--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
GCC's libstdc++ code crashes trying to use an instruction not supported by your
CPU. You need to report this to your distro.
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
` (4 preceding siblings ...)
2018-08-22 8:27 ` bugzilla-daemon
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From: bugzilla-daemon @ 2018-08-27 14:47 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
Sergey Kondakov <virtuousfox@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://bugzilla.opensuse.o
| |rg/show_bug.cgi?id=1105608
--- Comment #4 from Sergey Kondakov <virtuousfox@gmail.com> ---
(In reply to Michel Dänzer from comment #3)
> GCC's libstdc++ code crashes trying to use an instruction not supported by
> your CPU. You need to report this to your distro.
So, I've bothered my distro's bugzilla, and gcc's, then figured out why it was
crashing: Mesa doesn't like being built with clang/gold and ThinLTO (Mesa
doesn't build via gcc with LTO and openSUSE's OBS can't handle gcc's LTO
implementation even if it would). I don't know the actual reason of the crash
but the guys there figured out that the crash was coming from AVX instruction
in Mesa's SWR code. The affected machine does not support any kind of AVX, so
it threw out the error. But it's unclear why SWR even been trying to initialize
during the load of r300_dri. If built without any {C,LD}FLAGS and with gcc,
nothing crashes even with SWR built and installed. And there is no trace of SWR
doing things at boot on AVX-capable amdgpu/radeonsi machine even with clang's
build.
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^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable
2018-08-22 5:15 [Bug 107655] X segfaults on startup in r300_dri.so, making system unusable bugzilla-daemon
` (5 preceding siblings ...)
2018-08-27 14:47 ` bugzilla-daemon
@ 2018-08-27 15:05 ` bugzilla-daemon
6 siblings, 0 replies; 8+ messages in thread
From: bugzilla-daemon @ 2018-08-27 15:05 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107655
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
Status|RESOLVED |REOPENED
QA Contact|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
Component|Drivers/Gallium/r300 |Drivers/Gallium/swr
Resolution|NOTOURBUG |---
--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Sergey Kondakov from comment #4)
> I don't know the actual reason of the crash but the guys there figured out that
> the crash was coming from AVX instruction in Mesa's SWR code. The affected
> machine does not support any kind of AVX, so it threw out the error. But it's
> unclear why SWR even been trying to initialize during the load of r300_dri.
I think it's the combination of two things:
* All Gallium drivers are linked into a single binary (so-called mega-driver)
* SWR is compiled with AVX support and has initializers which are automatically
executed when the above binary is dlopen()ed.
Until there's a solution for this, SWR cannot be enabled in a build which has
to run on non-AVX capable CPUs.
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