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https://bugzilla.novell.com/show_bug.cgi?id=718967

https://bugzilla.novell.com/show_bug.cgi?id=718967#c0


           Summary: Kernel BUG at drivers/gpu/drm/i915/i915_gem.c:3459
    Classification: openSUSE
           Product: openSUSE 12.1
           Version: Factory
          Platform: Other
        OS/Version: SuSE Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Kernel
        AssignedTo: sndirsch@xxxxxxxx
        ReportedBy: lchiquitto@xxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: Community User
           Blocker: ---


Setup:

- Dell Vostro 1310 laptop using Intel Integrated Graphics Chipset 965GM.
- Laptop's LCD display is DISABLED
- External monitor (VGA output) is ENABLED

How to trigger the BUG:

- Using GNOME's "Displays" settings, enable the laptop (LCD) display

The kernel will crash with the following signature:

[61005.678100] ------------[ cut here ]------------
[61005.678360] kernel BUG at
/usr/src/packages/BUILD/kernel-desktop-3.1.rc5/linux-3.1-rc5/drivers/gpu/drm/i915/i915_gem.c:3459!
[61005.678862] invalid opcode: 0000 [#1] PREEMPT SMP 
[61005.679023] CPU 1 
[61005.679023] Modules linked in: fuse af_packet rpcsec_gss_krb5 nfs lockd
fscache auth_rpcgss nfs_acl sunrpc cpufreq_conservative cpufreq_userspace
cpufreq_powersave acpi_cpufreq mperf microcode coretemp dell_laptop dcdbas
kvm_intel kvm sr_mod cdrom sg arc4 snd_hda_codec_realtek iwl3945 snd_hda_intel
iwl_legacy mac80211 snd_hda_codec snd_hwdep snd_pcm uvcvideo firewire_ohci
sdhci_pci videodev cfg80211 snd_timer sdhci snd soundcore dell_wmi
firewire_core iTCO_wdt sparse_keymap joydev v4l2_compat_ioctl32 pcspkr mmc_core
crc_itu_t i2c_i801 iTCO_vendor_support rfkill r8169 snd_page_alloc wmi battery
ac autofs4 dm_mod linear i915 drm_kms_helper drm i2c_algo_bit button video fan
processor ata_generic thermal thermal_sys
[61005.679023] 
[61005.679023] Pid: 1392, comm: Xorg Not tainted 3.1.0-rc5-2-desktop #1 Dell
Inc. Vostro1310/0K866H
[61005.679023] RIP: 0010:[<ffffffffa00c2c12>]  [<ffffffffa00c2c12>]
i915_gem_object_unpin+0xa2/0xb0 [i915]
[61005.679023] RSP: 0018:ffff8801375a5c30  EFLAGS: 00010246
[61005.679023] RAX: ffff880136494000 RBX: ffff880136482800 RCX:
ffff88013628dac8
[61005.679023] RDX: 0000000000020410 RSI: ffff88013606c000 RDI:
ffff88011eca5800
[61005.679023] RBP: ffff880136494020 R08: ffff880136494438 R09:
ffffffffa00681a0
[61005.679023] R10: 0000000000000000 R11: 000000000000fffb R12:
ffff880136494450
[61005.679023] R13: ffff88009525c3c0 R14: 0000000000000000 R15:
ffff880136494000
[61005.679023] FS:  00007fb8607ca880(0000) GS:ffff88013fd00000(0000)
knlGS:0000000000000000
[61005.679023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[61005.679023] CR2: 00007fff002b3cb8 CR3: 00000001375ad000 CR4:
00000000000006e0
[61005.679023] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[61005.679023] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[61005.679023] Process Xorg (pid: 1392, threadinfo ffff8801375a4000, task
ffff88013808e3c0)
[61005.679023] Stack:
[61005.679023]  ffffffffa00cb682 ffff88009525c3c0 ffff880136482800
ffffffffa01232c0
[61005.679023]  ffffffffa009175c ffff880136482800 ffff8801375a5d28
ffff880136494420
[61005.679023]  ffffffffa0092e8c ffff880100000004 000000000001d591
0000000000000000
[61005.679023] Call Trace:
[61005.679023]  [<ffffffffa00cb682>] intel_crtc_disable+0x42/0x70 [i915]
[61005.679023]  [<ffffffffa009175c>]
drm_helper_disable_unused_functions+0x10c/0x180 [drm_kms_helper]
[61005.679023]  [<ffffffffa0092e8c>] drm_crtc_helper_set_config+0x89c/0x980
[drm_kms_helper]
[61005.679023]  [<ffffffffa004a5af>] drm_framebuffer_cleanup+0xaf/0xd0 [drm]
[61005.679023]  [<ffffffffa00cc3da>] intel_user_framebuffer_destroy+0x1a/0x70
[i915]
[61005.679023]  [<ffffffffa004cec3>] drm_mode_rmfb+0xc3/0x120 [drm]
[61005.679023]  [<ffffffffa003e2bc>] drm_ioctl+0x39c/0x460 [drm]
[61005.679023]  [<ffffffff811638b5>] do_vfs_ioctl+0x85/0x2e0
[61005.679023]  [<ffffffff81163ba8>] sys_ioctl+0x98/0xa0
[61005.679023]  [<ffffffff8159fa92>] system_call_fastpath+0x16/0x1b
[61005.679023]  [<00007fb85ea1c877>] 0x7fb85ea1c876
[61005.679023] Code: 00 48 89 96 78 16 00 00 48 81 c6 70 16 00 00 48 89 b7 b0
00 00 00 48 89 87 b8 00 00 00 48 89 10 80 a7 e2 00 00 00 f7 f3 c3 0f 0b <0f> 0b
66 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 78 48 89 5c 
[61005.679023] RIP  [<ffffffffa00c2c12>] i915_gem_object_unpin+0xa2/0xb0 [i915]
[61005.679023]  RSP <ffff8801375a5c30>

I've captured a vmcore, but it will be very difficult to upload due to my
(very) limited upload bandwidth. I'll attach Xorg logs and full dmesg
(extracted from the vmcore) in the next comments.

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