System Environment: -------------------------- Arch: i386 Platform: SNB(Huronriver) Libdrm: (master)2.4.24-9-g5cb554a0d6e986f2d7300a91d95983fa09b17f65 Mesa: (master)5eb9f687087a4bc71775a32efcd848fc6cd67694 Xserver:(master)xorg-server-1.10.0-143-g327e1d88012102af6aca6c6840aa0ed3c7041a77 Xf86_video_intel:(master)2.14.902-2-g630d77bf10ba6234bb9c04538636f7d8aa319aea Kernel: (drm-intel-next)f0c860246472248a534656d6cdbed5a36d1feb2e Bug detailed description: ------------------------- With latest Mesa(master) code, starting up gnome desktop with compiz make GPU hangs, and then system hangs(hard hang). Error in output: (EE) intel(0): Detected a hung GPU, disabling acceleration. [mi] EQ overflowing. The server is probably stuck in an infinite loop. Backtrace: 0: X (xorg_backtrace+0x3b) [0x80a600b] 1: X (mieqEnqueue+0x1ab) [0x809dd6b] 2: X (xf86PostMotionEventM+0xbf) [0x80ba3bf] 3: /opt/X11R7/lib/xorg/modules/input/evdev_drv.so (0xb7302000+0x444f) [0xb730644f] 4: /opt/X11R7/lib/xorg/modules/input/evdev_drv.so (0xb7302000+0x48b5) [0xb73068b5] 5: X (0x8048000+0x6f3cf) [0x80b73cf] 6: X (0x8048000+0x10d844) [0x8155844] 7: (vdso) (__kernel_sigreturn+0x0) [0xb7876400] 8: /opt/X11R7/lib/libpixman-1.so.0 (pixman_image_composite32+0x3c1) [0xb7814a71] 9: /opt/X11R7/lib/libpixman-1.so.0 (pixman_image_composite+0x8c) [0xb78151bc] 10: /opt/X11R7/lib/xorg/modules/libfb.so (fbComposite+0x1bb) [0xb76cb43b] 11: /opt/X11R7/lib/xorg/modules/drivers/intel_drv.so (0xb76de000+0x2e5eb) [0xb770c5eb] 12: /opt/X11R7/lib/xorg/modules/drivers/intel_drv.so (0xb76de000+0x2cca8) [0xb770aca8] 13: /opt/X11R7/lib/xorg/modules/drivers/intel_drv.so (0xb76de000+0x285d6) [0xb77065d6] 14: X (0x8048000+0xca589) [0x8112589] 15: X (CompositeGlyphs+0xb0) [0x810f100] 16: X (0x8048000+0xc253b) [0x810a53b] 17: X (0x8048000+0xbe2b3) [0x81062b3] 18: X (0x8048000+0x3e297) [0x8086297] 19: X (0x8048000+0x1a2ca) [0x80622ca] 20: /lib/libc.so.6 (__libc_start_main+0xe6) [0x48aa2cc6] 21: X (0x8048000+0x19e91) [0x8061e91] Bisect shows 9a21bc640188e4078075b9f8e6701853a4f0bbe4 is the first bad commit commit 9a21bc640188e4078075b9f8e6701853a4f0bbe4 Author: Kenneth Graunke <kenneth@whitecape.org> AuthorDate: Wed Mar 16 14:09:17 2011 -0700 Commit: Kenneth Graunke <kenneth@whitecape.org> CommitDate: Tue Mar 29 05:29:06 2011 -0700 i965: Refactor Sandybridge implied move handling. This was open-coded in three different places, and more are necessary. Extract this into a function so it can be reused. Unfortunately, not all variations were the same: in particular, one set compression control and checked that the source register was not ARF_NULL. This seemed like a good idea, so all cases now do so. Bug reproduce steps: --------------------------- 1. start gnome-sesison with compiz enabled
*** Bug 35853 has been marked as a duplicate of this bug. ***
Ken: Can you see if you can reproduce this? It is bisected to one of your refactoring commits. Fang: Is this Huron River GT1 or GT2? Is it reproducible on other SNB platforms or just that one?
It happens on all our SNB testing machines: Huron River(id=0x0116, rev 09, GT2), Huron River(id=0x0126, rev 08, GT2+), Sugarbay(id=0x0112, rev 09, GT2), Sugarbay(id=0x0102, rev 09, GT1). BTW, we have no Huron River GT1 for testing.
I can reproduce this (checking with gnome shell at the moment; haven't tried compiz yet). It looks like the wm_emit backend is generating obviously broken code now. I should have a fix soon.
I tested GNOME Shell and Compiz. Both work with the following commit: commit a019dd0d6e5bba00e8ee7818e004ee42ca507102 Author: Kenneth Graunke <kenneth@whitecape.org> Date: Sun Apr 3 00:57:30 2011 -0700 i965: Fix null register use in Sandybridge implied move resolution. Fixes regressions caused by commit 9a21bc6401, namely GPU hangs when running gnome-shell or compiz (Mesa bugs #35820 and #35853). I incorrectly refactored the case that dealt with ARF_NULL; even in that case, the source register needs to be changed to the MRF. NOTE: This is a candidate for the 7.10 branch (if 9a21bc6401 is cherry-picked, take this one too).
Verified with Mesa master commit: 6caac3ecb8bc32d92c35fdb1f0a67541ffa8af29.
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