2.6.37: BUG at drivers/gpu/drm/i915/i915_gem.c:4190!

[Toralf Förster]

Chris Wilson wrote at 12:11:06
> It's an old pin leak [https://bugzilla.kernel.org/show_bug.cgi?id=17181].
> I keep finding little buglets that might contribute, but so far
> inconclusive. The latest one was:

Well, in the current 2.6.38-rc2 kernel there seems to be an issue left to fix:

...
2011-01-23T11:44:40.488+01:00 n22 kernel: PM: Syncing filesystems ... done.
2011-01-23T11:44:40.488+01:00 n22 kernel: PM: Preparing system for mem sleep
2011-01-23T11:44:40.606+01:00 n22 kernel: ------------[ cut here ]------------
2011-01-23T11:44:40.606+01:00 n22 kernel: kernel BUG at drivers/gpu/drm/i915/i915_gem.c:3298!
2011-01-23T11:44:40.606+01:00 n22 kernel: invalid opcode: 0000 [#1] SMP
2011-01-23T11:44:40.606+01:00 n22 kernel: last sysfs file: /sys/power/state
2011-01-23T11:44:40.606+01:00 n22 kernel: Modules linked in: af_packet pppoe pppox ppp_generic slhc fuse hdaps input_polldev acpi_cpufreq mperf dm_mod 
hid_cherry usblp usbhid hid arc4 ecb crypto_blkcipher snd_hda_codec_conexant cryptomgr aead snd_hda_intel snd_hda_codec fbcon crypto_algapi font snd_pcm 
ehci_hcd bitblit uhci_hcd i915 softcursor iwlagn usbcore drm_kms_helper drm iwlcore fb mac80211 fbdev thinkpad_acpi i2c_algo_bit cfg80211 hwmon cfbcopyarea 
8250_pci sr_mod snd_timer i2c_i801 video cfbimgblt e1000e cfbfillrect snd_page_alloc rfkill cdrom i2c_core snd intel_agp intel_gtt 8250_pnp nls_base soundcore 
nvram agpgart battery evdev wmi psmouse ac thermal button processor 8250 serial_core
2011-01-23T11:44:40.606+01:00 n22 kernel: 
2011-01-23T11:44:40.606+01:00 n22 kernel: Pid: 2841, comm: X Not tainted 2.6.38-rc2+ #1 6474B84/6474B84
2011-01-23T11:44:40.606+01:00 n22 kernel: EIP: 0060:[<f88405ce>] EFLAGS: 00213246 CPU: 0
2011-01-23T11:44:40.606+01:00 n22 kernel: EIP is at i915_gem_object_unpin+0x8e/0xa0 [i915]
2011-01-23T11:44:40.606+01:00 n22 kernel: EAX: f5438dc0 EBX: f51dc000 ECX: 000200f8 EDX: f531e000

With the SysRq keys I was able to reboot the system (intel i915, GM45 card, ThinkPad T400).

-- 
MfG/Kind regards
Toralf Förster

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