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[Tomas <1341078@xxxxxxxxxxxxxxxxxx>]

apport information

** Attachment added: "CurrentDmesg.txt"
   https://bugs.launchpad.net/bugs/1341078/+attachment/4151051/+files/CurrentDmesg.txt

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https://bugs.launchpad.net/bugs/1341078

Title:
  Video randomly freezes. drivers/gpu/drm/drm_crtc.c

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  this bug appears randomly. i dont know what triggers this bug or to
  witch packet it belongs. when i get this error, everythin freezes,
  only mouse is moving. im using GNOME Shell 3.10.4. dmesg shows:

  [ 7682.516666] ------------[ cut here ]------------
  [ 7682.516713] WARNING: CPU: 1 PID: 1140 at /build/buildd/linux-3.13.0/drivers/gpu/drm/drm_crtc.c:2097 drm_mode_set_config_internal+0xd6/0xe0 [drm]()
  [ 7682.516774] Modules linked in: ctr ccm pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) snd_hda_codec_realtek snd_hda_codec_hdmi bnep rfcomm binfmt_misc hid_generic usbhid hid uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev nls_iso8859_1 kvm_amd kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul ath3k glue_helper ablk_helper btusb cryptd bluetooth joydev serio_raw snd_hda_intel snd_hda_codec snd_hwdep snd_pcm arc4 snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi ath9k ath9k_common ath9k_hw snd_seq ath snd_seq_device mac80211 snd_timer snd cfg80211 k10temp i2c_piix4 radeon ttm drm_kms_helper soundcore drm i2c_algo_bit wmi video mac_hid parport_pc ppdev lp parport psmouse ahci libahci r8169 mii
  [ 7682.516779] CPU: 1 PID: 1140 Comm: Xorg Tainted: GF          O 3.13.0-30-generic #54-Ubuntu
  [ 7682.516781] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 535U3C/NP535U3C-A01EE, BIOS P07RAS.W73.130411.LEO 04/11/2013
  [ 7682.516787]  0000000000000009 ffff8800874efab0 ffffffff8171a324 0000000000000000
  [ 7682.516791]  ffff8800874efae8 ffffffff810676bd ffff880139e310a0 0000000000000000
  [ 7682.516795]  ffff880095301000 ffff88009454c060 0000000000000080 ffff8800874efaf8
  [ 7682.516796] Call Trace:
  [ 7682.516808]  [<ffffffff8171a324>] dump_stack+0x45/0x56
  [ 7682.516814]  [<ffffffff810676bd>] warn_slowpath_common+0x7d/0xa0
  [ 7682.516819]  [<ffffffff8106779a>] warn_slowpath_null+0x1a/0x20
  [ 7682.516846]  [<ffffffffa0094f36>] drm_mode_set_config_internal+0xd6/0xe0 [drm]
  [ 7682.516860]  [<ffffffffa00eff41>] drm_fb_helper_set_par+0x71/0xf0 [drm_kms_helper]
  [ 7682.516867]  [<ffffffff813c77c1>] fb_set_var+0x191/0x430
  [ 7682.516873]  [<ffffffff810a2ce0>] ? update_curr+0x80/0x180
  [ 7682.516880]  [<ffffffff813d47a1>] fbcon_blank+0x1d1/0x2d0
  [ 7682.516885]  [<ffffffff8109814d>] ? ttwu_do_activate.constprop.74+0x5d/0x70
  [ 7682.516892]  [<ffffffff8145cdb8>] do_unblank_screen+0xb8/0x1f0
  [ 7682.516897]  [<ffffffff81452b1a>] complete_change_console+0x5a/0xe0
  [ 7682.516901]  [<ffffffff81453b4a>] vt_ioctl+0xfaa/0x11c0
  [ 7682.516906]  [<ffffffff811dc384>] ? mntput+0x24/0x40
  [ 7682.516911]  [<ffffffff8144758d>] tty_ioctl+0x26d/0xbb0
  [ 7682.516918]  [<ffffffff811cfa20>] do_vfs_ioctl+0x2e0/0x4c0
  [ 7682.516921]  [<ffffffff8109dd94>] ? vtime_account_user+0x54/0x60
  [ 7682.516927]  [<ffffffff811cfc81>] SyS_ioctl+0x81/0xa0
  [ 7682.516932]  [<ffffffff8172aeff>] tracesys+0xe1/0xe6
  [ 7682.516935] ---[ end trace 54f89ecfaa291f44 ]---

  lspci -v | grep VGA
  00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7500G] (prog-if 00 [VGA controller])

  sudo lshw -c video

    *-display               
         description: VGA compatible controller
         product: Trinity [Radeon HD 7500G]
         vendor: Advanced Micro Devices, Inc. [AMD/ATI]
         physical id: 1
         bus info: pci@0000:00:01.0
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
         configuration: driver=radeon latency=0
         resources: irq:44 memory:c0000000-cfffffff ioport:f000(size=256) memory:feb00000-feb3ffff

  lsb_release -rd

  Description:	Ubuntu 14.04 LTS
  Release:	14.04
  --- 
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  tomas      2276 F.... pulseaudio
   /dev/snd/pcmC1D0p:   tomas      2276 F...m pulseaudio
   /dev/snd/controlC0:  tomas      2276 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=545231a6-176b-4042-a8df-ad34eee43ebe
  InstallationDate: Installed on 2014-05-08 (64 days ago)
  InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 535U3C
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic.efi.signed root=UUID=0155a3b6-1ea0-4daf-b2cd-595f2d16fdb3 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-30-generic N/A
   linux-backports-modules-3.13.0-30-generic  N/A
   linux-firmware                             1.127.4
  Tags:  trusty
  Uname: Linux 3.13.0-30-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-05-09 (64 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/11/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P07RAS.W73.130411.LEO
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: NP535U3C-A01EE
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SEC_SW_REVISION_1234567890ABCD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP07RAS.W73.130411.LEO:bd04/11/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn535U3C:pvrP07RAS:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP535U3C-A01EE:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: 535U3C
  dmi.product.version: P07RAS
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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