Bug 100984

Summary:	QupZilla crashes at startup after mesa upgrade
Product:	Spam	Reporter:	Francesco Turco <fturco>
Component:	Two	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED INVALID	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	gdb backtrace (basic version) gdb backtrace (full version)

Description Francesco Turco 2017-05-10 05:27:22 UTC

Since I upgraded media-libs/mesa from version 17.0.4 to version 17.1.0_rc4 I cannot start QupZilla anymore because it produces a segmentation fault. I have an Intel GPU (Q35 chipset). My GNU/Linux distribution is Gentoo.

# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express Integrated Graphics Controller (rev 02)

# emerge -pv qupzilla mesa

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] www-client/qupzilla-2.1.2::gentoo  USE="dbus -debug -gnome-keyring -kwallet -libressl -nonblockdialogs" LINGUAS="-ar_SA -bg_BG -ca_ES -cs_CZ -da_DK -de_DE -el_GR -es_ES -es_MX -es_VE -eu_ES -fa_IR -fi_FI -fr_FR -gl_ES -he_IL -hr_HR -hu_HU -id_ID -is -it_IT -ja_JP -ka_GE -lg -lt -lv_LV -nl_NL -nqo -pl_PL -pt_BR -pt_PT -ro_RO -ru_RU -sk_SK -sr -sr@ijekavian -sr@ijekavianlatin -sr@latin -sv_SE -tr_TR -uk_UA -uz@Latn -zh_CN -zh_HK -zh_TW" 2,703 KiB
[ebuild   R    ] media-libs/mesa-17.1.0_rc4::gentoo  USE="classic debug dri3 egl gallium gbm nptl -bindist -d3d9 -gles1 -gles2 -llvm -opencl -openmax -osmesa -pax_kernel -pic (-selinux) -vaapi -valgrind -vdpau -vulkan -wayland -xa -xvmc" VIDEO_CARDS="i915 intel (-freedreno) -i965 -imx -nouveau -r100 -r200 -r300 -r600 -radeon -radeonsi (-vc4) (-vivante) -vmware" 0 KiB

Total: 2 packages (2 reinstalls), Size of downloads: 2,703 KiB

Comment 1 Francesco Turco 2017-05-10 05:28:25 UTC

Created attachment 131290 [details]
gdb backtrace (basic version)

I used the "bt" gdb command.

Comment 2 Francesco Turco 2017-05-10 05:29:11 UTC

Created attachment 131291 [details]
gdb backtrace (full version)

I used the "thread apply all bt full" gdb command.

Comment 3 Francesco Turco 2017-05-11 15:34:48 UTC

I found another applications that segfaults with media-libs/mesa-17.1.0_rc4 and media-libs/mesa-9999 (git version): media-video/mpv.

Comment 4 Francesco Turco 2017-05-11 15:56:16 UTC

See also https://bugs.gentoo.org/show_bug.cgi?id=618206

Comment 5 Emil Velikov 2017-05-11 20:50:40 UTC

Francesco there can be two driver for your device. The following command will show  which one.
$ glxinfo| grep "renderer string"

In either case - these drivers have hardly anyone looking at them, so a simple test case, or a offending commit considering it's a regression, will be appreciated.

Comment 6 Francesco Turco 2017-05-11 21:31:35 UTC

$ glxinfo | grep "renderer string"
couldn't open libtxc_dxtn.so, software DXTn compression/decompression unavailable
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
Mesa warning: couldn't open libtxc_dxtn.so, software DXTn compression/decompression unavailable
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.
OpenGL renderer string: Gallium 0.4 on i915 (chipset: Q35)
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
i915_program_error: bad opcode 133
i915_program_error: bad opcode 121
Mesa warning: couldn't open libtxc_dxtn.so, software DXTn compression/decompression unavailable
i915_get_shader_param: Unknown cap 28.
i915_get_shader_param: Unknown cap 30.
i915_get_param: Unknown cap 49.
i915_get_param: Unknown cap 119.
i915_get_param: Unknown cap 49.

Comment 7 Alexander Tsoy 2017-05-14 22:13:26 UTC

Confirming this issue with i915g driver.

$ DISPLAY=:0 glxinfo | egrep 'renderer string|OpenGL version string'
OpenGL renderer string: Gallium 0.4 on i915 (chipset: 945GM)
OpenGL version string: 2.1 Mesa 17.1.0-rc4

"glxgears" and "mpv --vo=opengl" segfaults:

[35772.915780] mpv/vo[8568]: segfault at 12c ip 00007f456c76ae76 sp 00007f456dbad880 error 4 in i915g_dri.so[7f456c261000+6a9000]
[35779.817131] mpv/vo[8599]: segfault at 12c ip 00007f14033bce76 sp 00007f1408b6a880 error 4 in i915g_dri.so[7f1402eb3000+6a9000]
[35792.307840] glxgears[8625]: segfault at 12c ip 00007f07ee640e76 sp 00007fff2adb5900 error 4 in i915g_dri.so[7f07ee137000+6a9000]
[35874.392980] glxgears[8638]: segfault at 12c ip 00007f54a2cfae76 sp 00007ffeb5249370 error 4 in i915g_dri.so[7f54a27f1000+6a9000]

Comment 8 Alexander Tsoy 2017-05-15 09:17:45 UTC

This is probably a duplicate of bug 100189.

Comment 9 Francesco Turco 2017-05-20 12:15:50 UTC

I have upgraded media-libs/mesa from 17.1.0_rc4 to 17.1.0.

After running "eselect mesa set i915 2" (gallium) both qupzilla and mpv crash.
After running "eselect mesa set i915 1" (classic) both qupzilla and mpv run successfully.

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