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[Matthew Caron <matt@xxxxxxxxxxxxx>]

apport information

** Attachment added: "UdevLog.txt"
   https://bugs.launchpad.net/bugs/1404242/+attachment/4284247/+files/UdevLog.txt

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https://bugs.launchpad.net/bugs/1404242

Title:
  Radeon crash on 14.04 LTS stops Xorg from starting

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Kernel message:

  [   31.778064] BUG: unable to handle kernel paging request at ffffec2000000900
  [   31.778105] IP: [<ffffffff811a2046>] kfree+0x56/0x140
  [   31.778133] PGD 0 
  [   31.778145] Oops: 0000 [#1] SMP 
  [   31.778165] Modules linked in: snd_hrtimer pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) bnep rfcomm bluetooth ip6t_REJECT xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables radeon snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec gpio_ich snd_hwdep kvm_intel snd_pcm snd_page_alloc ttm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device kvm snd_timer drm_kms_helper snd drm soundcore i2c_algo_bit serio_raw x38_edac lpc_ich edac_core mac_hid binfmt_misc parport_pc ppdev vhba(OX) coretemp it87 hwmon_vid lp parport pata_acpi hid_generic usbhid hid raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor firewire_ohci firewire_core crc_itu_t ahci raid6_pq r8169 pata_jmicron mii libahci raid1 raid0 multipath floppy linear
  [   31.778734] CPU: 0 PID: 2402 Comm: Xorg Tainted: G           OX 3.13.0-43-generic #72-Ubuntu
  [   31.778769] Hardware name: Gigabyte Technology Co., Ltd. X48-DQ6/X48-DQ6, BIOS F6 02/29/2008
  [   31.778805] task: ffff8802229e6000 ti: ffff8802216da000 task.ti: ffff8802216da000
  [   31.778835] RIP: 0010:[<ffffffff811a2046>]  [<ffffffff811a2046>] kfree+0x56/0x140
  [   31.778869] RSP: 0018:ffff8802216dba68  EFLAGS: 00010286
  [   31.778892] RAX: ffffec2000000900 RBX: 0000100000024414 RCX: 0000000000000000
  [   31.778922] RDX: ffffea0000000000 RSI: 0000000000005f78 RDI: 0000100000024414
  [   31.778951] RBP: ffff8802216dba80 R08: 0000000000000013 R09: 0000000000000012
  [   31.778980] R10: ffffea000880a380 R11: ffffffffa0405bc1 R12: 0000000000000000
  [   31.779009] R13: ffffffffa04623b6 R14: 0000000000000000 R15: ffff88003655e400
  [   31.779039] FS:  00007f229d9019c0(0000) GS:ffff88022fc00000(0000) knlGS:0000000000000000
  [   31.779072] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [   31.779096] CR2: ffffec2000000900 CR3: 00000002209d8000 CR4: 00000000000007f0
  [   31.779125] Stack:
  [   31.779135]  ffff8800cae30000 0000000000000000 ffff8800cae30000 ffff8802216dbb38
  [   31.779174]  ffffffffa04623b6 ffff8802216dbab0 ffff880200007048 000070440000712c
  [   31.779211]  ffff8802209ee000 0000100000024414 0000188000024414 0000180000028488
  [   31.779249] Call Trace:
  [   31.779289]  [<ffffffffa04623b6>] evergreen_hdmi_setmode+0x776/0x960 [radeon]
  [   31.779334]  [<ffffffffa01b855e>] ? drm_detect_hdmi_monitor+0x6e/0xb0 [drm]
  [   31.779385]  [<ffffffffa0469788>] radeon_atom_encoder_mode_set+0x158/0x2d0 [radeon]
  [   31.779421]  [<ffffffffa022da98>] drm_crtc_helper_set_mode+0x498/0x500 [drm_kms_helper]
  [   31.779470]  [<ffffffffa0413d35>] radeon_property_change_mode.isra.1+0x35/0x40 [radeon]
  [   31.779519]  [<ffffffffa0413ece>] radeon_connector_set_property+0x18e/0x300 [radeon]
  [   31.779562]  [<ffffffffa01b5732>] drm_mode_obj_set_property_ioctl+0x142/0x340 [drm]
  [   31.779604]  [<ffffffffa01b5960>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
  [   31.779644]  [<ffffffffa01a4c22>] drm_ioctl+0x502/0x630 [drm]
  [   31.779672]  [<ffffffff8172cc94>] ? __do_page_fault+0x204/0x560
  [   31.779707]  [<ffffffffa03d50fe>] radeon_drm_ioctl+0x4e/0x90 [radeon]
  [   31.779736]  [<ffffffff811d0e90>] do_vfs_ioctl+0x2e0/0x4c0
  [   31.779762]  [<ffffffff811c01b1>] ? __sb_end_write+0x31/0x60
  [   31.779787]  [<ffffffff811d10f1>] SyS_ioctl+0x81/0xa0
  [   31.779810]  [<ffffffff817316ad>] system_call_fastpath+0x1a/0x1f
  [   31.779836] Code: 00 00 00 80 ff 77 00 00 48 01 d8 48 0f 42 15 e2 2f a7 00 48 01 d0 48 ba 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 d0 <48> 8b 10 80 e6 80 0f 85 be 00 00 00 49 89 c2 49 8b 02 a8 80 0f 
  [   31.780000] RIP  [<ffffffff811a2046>] kfree+0x56/0x140
  [   31.780000]  RSP <ffff8802216dba68>
  [   31.780000] CR2: ffffec2000000900

  Kernel is:

  3.13.0-43-generic

  This looks similar to #1397553, except applies to Trusty.
  --- 
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/by-path', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p', '/dev/snd/controlC1', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=/dev/mapper/drives-swap
  IwConfig:
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. X48-DQ6
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-28-generic root=/dev/mapper/drives-root ro splash quiet nomdmonddf nomdmonisw vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-28.38~14.04.1-generic 3.16.7-ckt1
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-28-generic N/A
   linux-backports-modules-3.16.0-28-generic  N/A
   linux-firmware                             1.127.10
  RfKill:
   
  Tags:  trusty
  Uname: Linux 3.16.0-28-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers video
  _MarkForUpload: True
  dmi.bios.date: 02/29/2008
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F6
  dmi.board.name: X48-DQ6
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd02/29/2008:svnGigabyteTechnologyCo.,Ltd.:pnX48-DQ6:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX48-DQ6:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: X48-DQ6
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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