i915: repeatable NULL pointer oops via i915_driver_lastclose+0x30/0x60 on connection to KVM

[Dave Gilbert]

My dad's new machine (freshly installed with Quantal) reliably kernel panics at boot iff connected via a kvm
switch.

    6.265801] [drm:drm_pci_agp_init] *ERROR* Cannot initialize the agpgart module.
[ 6.280161] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 6.280235] IP: [<ffffffff8168120a>] __mutex_lock_slowpath+0xaa/0x150
[ 6.280287] PGD 210274067 PUD 210275067 PMD 0
[ 6.280359] Oops: 0002 [#1] SMP
[ 6.280416] CPU 0
[ 6.280433] Modules linked in: i915(+) snd_rawmidi snd_seq_midi_event snd_seq snd_timer kvm snd_seq_device drm_kms_helper drm snd soundcore eeepc_wmi snd_page_alloc ghash_clmul
ni_intel asus_wmi psmouse mei cryptd i2c_algo_bit sparse_keymap lpc_ich wmi joydev microcode serio_raw mac_hid video hid_generic r8169 usbhid hid usb_storage
[ 6.281012]
[ 6.281037] Pid: 350, comm: modprobe Not tainted 3.5.0-18-generic #29-Ubuntu System manufacturer System Product Name/P8H61-MX R2.0
[ 6.281130] RIP: 0010:[<ffffffff8168120a>] [<ffffffff8168120a>] __mutex_lock_slowpath+0xaa/0x150
[ 6.281194] RSP: 0018:ffff88021060dd38 EFLAGS: 00010246
[ 6.281226] RAX: 0000000000000000 RBX: ffff88021333aba0 RCX: 0000000000000000
[ 6.281262] RDX: ffff88021060dd50 RSI: ffffffffa011aa1a RDI: ffff88021333aba4
[ 6.281297] RBP: ffff88021060dd98 R08: 0000000000000316 R09: 0000000000000000
[ 6.281332] R10: ffffffff8184b320 R11: 0000000000000000 R12: ffff880210a60000
[ 6.281368] R13: ffff88021333aba4 R14: 00000000ffffffff R15: ffff88021333aba8
[ 6.281404] FS: 00007f1439f25700(0000) GS:ffff88021fa00000(0000) knlGS:0000000000000000
[ 6.281452] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.281485] CR2: 0000000000000000 CR3: 00000002103b8000 CR4: 00000000000407f0
[ 6.281520] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 6.281556] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 6.281591] Process modprobe (pid: 350, threadinfo ffff88021060c000, task ffff880210a60000)
[ 6.281639] Stack:
[ 6.281666] 0000000000000000 ffff88021410c090 ffff88021060dda8 ffff88021333aba8
[ 6.281766] 0000000000000000 0000000000000018 ffff88021060ddb8 ffff88021333aba0
[ 6.281866] ffff88021333a800 ffff88021333aba0 0000000000000000 ffff88021410c090
[ 6.281966] Call Trace:
[ 6.281997] [<ffffffff81680d0a>] mutex_lock+0x2a/0x50
[ 6.282042] [<ffffffffa0218e5b>] intel_fb_restore_mode+0x2b/0xb0 [i915]
[ 6.282085] [<ffffffffa01dc120>] i915_driver_lastclose+0x30/0x60 [i915]
[ 6.282124] [<ffffffffa00f479a>] drm_lastclose+0x4a/0x320 [drm]
[ 6.282163] [<ffffffffa00fa919>] drm_fill_in_dev+0x139/0x1c0 [drm]
[ 6.282202] [<ffffffffa00fd243>] drm_get_pci_dev+0xd3/0x310 [drm]
[ 6.282238] [<ffffffff8135ad02>] ? pci_get_subsys+0x92/0xd0
[ 6.282274] [<ffffffffa00fd54e>] drm_pci_init+0xce/0x130 [drm]
[ 6.282309] [<ffffffffa0258000>] ? 0xffffffffa0257fff
[ 6.282348] [<ffffffffa0258066>] i915_init+0x66/0x68 [i915]
[ 6.282383] [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[ 6.282418] [<ffffffff810b5a42>] sys_init_module+0xc2/0x230
[ 6.282454] [<ffffffff8168b629>] system_call_fastpath+0x16/0x1b
[ 6.282487] Code: 00 4c 8d 6b 04 4c 8d 7b 08 41 be ff ff ff ff 4c 89 ef e8 7a 21 00 00 48 8b 43 10 48 8d 55 b8 4c 89 7d b8 48 89 53 10 48 89 45 c0 <48> 89 10 44 89 f0 4c 89 65
c8 87 03 83 f8 01 75 24 eb 2c 0f 1f
[ 6.283427] RIP [<ffffffff8168120a>] __mutex_lock_slowpath+0xaa/0x150
[ 6.283476] RSP <ffff88021060dd38>
[ 6.283505] CR2: 0000000000000000
[ 6.283610] ---[ end trace 16d0fffc802f787b ]---

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-18-generic 3.5.0-18.29
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D2p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Sun Nov 11 15:58:14 2012
HibernationDevice: RESUME=UUID=313fbfe9-c86c-41cc-afc9-6a5713330d47
InstallationDate: Installed on 2012-11-10 (1 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: System manufacturer System Product Name
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=linux
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=5b08448e-d2ba-49b3-a998-8a780bb90090 ro recovery nomodeset
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-18-generic N/A
 linux-backports-modules-3.5.0-18-generic N/A
 linux-firmware 1.95
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/29/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0504
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H61-MX R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0504:bd06/29/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H61-MXR2.0:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Dave Gilbert (ubuntu-treblig)]

Some addirtional notes:
  * It works if the monitor is connected directly
  * The KVM is an old Belkin 8 way Omniview 8 pro (which works fine with the other machines)
  * This ubuntu-bug capture was made from the rescue shell after bringing up the networking manually
  * The symptom as far as the user goes is that they see the empty purple background come up, then the monitor blanks and never comes back.
  * The machine is a zoostorm 7873-7071 which seems to just be an Asus P8H61-MX motherboard + Intel G645 CPU - nothing particularly special.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Dave Gilbert (ubuntu-treblig)]

This is probably a dupe of bug 1070690

3.7.0-030700rc5 #201211110835 from the nightlies works for me (http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/ although I'm on a quantal userspace)
  So I say that makes it a fixed upstream

3.6.3-030603 #201210211349 boots but won't start X (but ctrl-alt-f1 gets me a console)

Dave