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[Bug 1296660] Re: Kernel oops: fb: conflicting fb hw usage astdrmfb vs VESA VGA (unable to handle kernel NULL pointer dereference / con_set_unimap+0x32

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: John Stultz <1296660@xxxxxxxxxxxxxxxxxx>
Date: Mon, 20 Oct 2014 20:43:14 -0000
Reply-to: Bug 1296660 <1296660@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Also seeing the issue here (on occasion) w/ 3.13.0-37-generic:

fb: conflicting fb hw usage nouveaufb vs VESA VGA - removing generic driver
Console: switching to colour dummy device 80x25
BUG: unable to handle kernel NULL pointer dereference at 0000000000000138
IP: [<ffffffff8145d382>] con_set_unimap+0x32/0x290
....
Call Trace:
[<ffffffff8131226d>] ? apparmor_capable+0x1d/0x130
[<ffffffff81457223>] vt_ioctl+0xe83/0x11c0
[<ffffffff8144ad3d>] tty_ioctl+0x26d/0xbb0
[<ffffffff811d03a0>] do_vfs_ioctl+0x2e0/0x4c0
[<ffffffff811d0601>] SyS_ioctl+0x81/0xa0
[<ffffffff8172f82d>] system_call_fastpath+0x1a/0x1f

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Title:
  Kernel oops: fb: conflicting fb hw usage astdrmfb vs VESA VGA (unable
  to handle kernel NULL pointer dereference / con_set_unimap+0x32

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Booting hangs on a Ubuntu Trusty Tahr (development branch)
  [3.13.0-18-generic #38-Ubuntu SMP Mon Mar 17 21:40:06 UTC 2014 x86_64]
  based system.  I can ping the system, but neither local nor remote
  login is possible.  The system log shows this:

  Mar 23 21:59:08 minerva kernel: [   36.301855] [drm] AST 2300 detected
  Mar 23 21:59:08 minerva kernel: [   36.301899] [drm] dram 1632000000 1 16 01000000
  Mar 23 21:59:08 minerva kernel: [   36.301968] [TTM] Zone  kernel: Available graphics memory: 8196666 kiB
  Mar 23 21:59:08 minerva kernel: [   36.301969] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
  Mar 23 21:59:08 minerva kernel: [   36.301969] [TTM] Initializing pool allocator
  Mar 23 21:59:08 minerva kernel: [   36.301972] [TTM] Initializing DMA pool allocator
  Mar 23 21:59:09 minerva kernel: [   36.470046] checking generic (f6000000 500000) vs hw (f6000000 1000000)
  Mar 23 21:59:09 minerva kernel: [   36.470047] fb: conflicting fb hw usage astdrmfb vs VESA VGA - removing generic driver
  Mar 23 21:59:09 minerva kernel: [   36.632111] Console: switching to colour dummy device 80x25
  Mar 23 21:59:09 minerva kernel: [   36.632129] BUG: unable to handle kernel NULL pointer dereference at 0000000000000138
  Mar 23 21:59:09 minerva kernel: [   36.632134] IP: [<ffffffff81451e12>] con_set_unimap+0x32/0x290
  Mar 23 21:59:09 minerva kernel: [   36.632136] PGD 35c24067 PUD 35c23067 PMD 0
  Mar 23 21:59:09 minerva kernel: [   36.632137] Oops: 0000 [#1] SMP
  Mar 23 21:59:09 minerva kernel: [   36.632152] Modules linked in: x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm ast(+) ttm drm_kms_helper crct10dif_pclmul crc32_pclmul drm ghash_clmulni_intel aesni_intel aes_x86_64 syscopyarea sysfillrect sysimgblt lrw gf128mul glue_helper ablk_helper cryptd joydev lpc_ich shpchp ipmi_si video mac_hid lp parport raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq igb hid_generic i2c_algo_bit raid1 dca usbhid raid0 ahci ptp multipath hid usb_storage libahci pps_core linear
  Mar 23 21:59:09 minerva kernel: [   36.632153] CPU: 4 PID: 665 Comm: setfont Not tainted 3.13.0-18-generic #38-Ubuntu
  Mar 23 21:59:09 minerva kernel: [   36.632154] Hardware name: Supermicro X10SLL+-F/X10SLL+-F, BIOS 1.1a 11/01/2013
  Mar 23 21:59:09 minerva kernel: [   36.632155] task: ffff880408512fe0 ti: ffff88040852a000 task.ti: ffff88040852a000
  Mar 23 21:59:09 minerva kernel: [   36.632157] RIP: 0010:[<ffffffff81451e12>]  [<ffffffff81451e12>] con_set_unimap+0x32/0x290
  Mar 23 21:59:09 minerva kernel: [   36.632157] RSP: 0018:ffff88040852bd48  EFLAGS: 00010246
  Mar 23 21:59:09 minerva kernel: [   36.632158] RAX: ffff880404ee3308 RBX: 0000000001bdcb10 RCX: 000000000000c710
  Mar 23 21:59:09 minerva kernel: [   36.632159] RDX: 0000000000001674 RSI: 0000000016761674 RDI: 0000000000000296
  Mar 23 21:59:09 minerva kernel: [   36.632159] RBP: ffff88040852bdb0 R08: ffff88040852a000 R09: 0000000000000000
  Mar 23 21:59:09 minerva kernel: [   36.632160] R10: 000000000000024f R11: 00000000000001e3 R12: 0000000000000000
  Mar 23 21:59:09 minerva kernel: [   36.632160] R13: 0000000000004b67 R14: ffff880404ee3000 R15: ffff880404ee3000
  Mar 23 21:59:09 minerva kernel: [   36.632161] FS:  00007fa963158740(0000) GS:ffff88041fd00000(0000) knlGS:0000000000000000
  Mar 23 21:59:09 minerva kernel: [   36.632162] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Mar 23 21:59:09 minerva kernel: [   36.632162] CR2: 0000000000000138 CR3: 0000000406428000 CR4: 00000000001407e0
  Mar 23 21:59:09 minerva kernel: [   36.632163] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  Mar 23 21:59:09 minerva kernel: [   36.632164] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Mar 23 21:59:09 minerva kernel: [   36.632164] Stack:
  Mar 23 21:59:09 minerva kernel: [   36.632166]  ffffffff8130bd6f ffff880408512fe0 0000000000000001 0000000000004b67
  Mar 23 21:59:09 minerva kernel: [   36.632168]  ffff880404ee3000 00000000fffffdfd 000002e10852bd88 ffff880404ee3000
  Mar 23 21:59:09 minerva kernel: [   36.632169]  0000000000000000 0000000000000001 0000000000004b67 ffff880404ee3000
  Mar 23 21:59:09 minerva kernel: [   36.632169] Call Trace:
  Mar 23 21:59:09 minerva kernel: [   36.632174]  [<ffffffff8130bd6f>] ? apparmor_capable+0x1f/0x1a0
  Mar 23 21:59:09 minerva kernel: [   36.632176]  [<ffffffff8144bcb3>] vt_ioctl+0xe83/0x11c0
  Mar 23 21:59:09 minerva kernel: [   36.632178]  [<ffffffff8143f7cd>] tty_ioctl+0x26d/0xbb0
  Mar 23 21:59:09 minerva kernel: [   36.632182]  [<ffffffff811cba30>] do_vfs_ioctl+0x2e0/0x4c0
  Mar 23 21:59:09 minerva kernel: [   36.632184]  [<ffffffff8109c944>] ? vtime_account_user+0x54/0x60
  Mar 23 21:59:09 minerva kernel: [   36.632185]  [<ffffffff811cbc91>] SyS_ioctl+0x81/0xa0
  Mar 23 21:59:09 minerva kernel: [   36.632187]  [<ffffffff81721c7f>] tracesys+0xe1/0xe6
  Mar 23 21:59:09 minerva kernel: [   36.632195] Code: 89 e5 41 57 49 89 ff 41 56 41 55 41 54 53 48 89 d3 48 83 ec 40 48 89 7d d0 89 75 cc e8 d8 83 c6 ff 49 8b 87 10 03 00 00 4c 8b 20 <41> 8b 84 24 38 01 00 00 85 c0 0f 85 38 02 00 00 66 83 7d cc 00
  Mar 23 21:59:09 minerva kernel: [   36.632196] RIP  [<ffffffff81451e12>] con_set_unimap+0x32/0x290
  Mar 23 21:59:09 minerva kernel: [   36.632197]  RSP <ffff88040852bd48>
  Mar 23 21:59:09 minerva kernel: [   36.632197] CR2: 0000000000000138
  Mar 23 21:59:09 minerva kernel: [   36.632198] ---[ end trace 2652027cc2a2f83c ]---
  Mar 23 21:59:09 minerva avahi-daemon[675]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.0.10.105.
  Mar 23 21:59:09 minerva avahi-daemon[675]: New relevant interface eth0.IPv4 for mDNS.
  Mar 23 21:59:09 minerva avahi-daemon[675]: Registering new address record for 10.0.10.105 on eth0.IPv4.
  Mar 23 21:59:14 minerva avahi-daemon[675]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::225:90ff:fed5:5776.
  Mar 23 21:59:14 minerva avahi-daemon[675]: New relevant interface eth0.IPv6 for mDNS.
  Mar 23 21:59:14 minerva avahi-daemon[675]: Registering new address record for fe80::225:90ff:fed5:5776 on eth0.*.

  Here the system hangs, i. e. it does not respond to console input, and
  it cannot be reached over the network (though the interfces are up,
  they can be pinged).

  The problem happens in about 3 out of 4 boot attempts; sometimes the
  system continues to boot - in this case we see this:

  Mar 24 11:06:06 minerva kernel: [   11.399169] [drm] Initialized drm 1.1.0 20060810
  Mar 24 11:06:06 minerva kernel: [   11.479197] [drm] AST 2300 detected
  Mar 24 11:06:06 minerva kernel: [   11.479220] [drm] dram 1632000000 1 16 01000000
  Mar 24 11:06:06 minerva kernel: [   11.479261] [TTM] Zone  kernel: Available graphics memory: 8196666 kiB
  Mar 24 11:06:06 minerva kernel: [   11.479263] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
  Mar 24 11:06:06 minerva kernel: [   11.479264] [TTM] Initializing pool allocator
  Mar 24 11:06:06 minerva kernel: [   11.479267] [TTM] Initializing DMA pool allocator
  Mar 24 11:06:07 minerva failsafe: Failsafe of 120 seconds reached.
  Mar 24 11:06:07 minerva kernel: [   11.575165] fbcon: astdrmfb (fb0) is primary device
  Mar 24 11:06:07 minerva kernel: [   11.649287] Console: switching to colour frame buffer device 160x64
  Mar 24 11:06:07 minerva kernel: [   11.687701] ast 0000:02:00.0: fb0: astdrmfb frame buffer device
  Mar 24 11:06:07 minerva kernel: [   11.687702] ast 0000:02:00.0: registered panic notifier
  Mar 24 11:06:07 minerva kernel: [   11.687712] [drm] Initialized ast 0.1.0 20120228 for 0000:02:00.0 on minor 0
  Mar 24 11:06:07 minerva avahi-daemon[620]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.0.10.105.
  Mar 24 11:06:07 minerva avahi-daemon[620]: New relevant interface eth0.IPv4 for mDNS.
  ...
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Mar 24 11:06 seq
   crw-rw---- 1 root audio 116, 33 Mar 24 11:06 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=63ab3bca-b769-466c-a5ca-67f8bcedc94a
  InstallationDate: Installed on 2012-05-16 (678 days ago)
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
  MachineType: Supermicro X10SLL+-F
  Package: linux (not installed)
  PciMultimedia:
   
  ProcFB: 0 astdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-18-generic root=UUID=8b466caa-6970-4ff1-843d-f4c0ff014407 ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw
  ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-18-generic N/A
   linux-backports-modules-3.13.0-18-generic  N/A
   linux-firmware                             1.126
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  trusty
  Uname: Linux 3.13.0-18-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-03-21 (3 days ago)
  UserGroups:
   
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 11/01/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.1a
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X10SLL+-F
  dmi.board.vendor: Supermicro
  dmi.board.version: 1.01
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 17
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 0123456789
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.1a:bd11/01/2013:svnSupermicro:pnX10SLL+-F:pvr0123456789:rvnSupermicro:rnX10SLL+-F:rvr1.01:cvnSupermicro:ct17:cvr0123456789:
  dmi.product.name: X10SLL+-F
  dmi.product.version: 0123456789
  dmi.sys.vendor: Supermicro

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