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[phil <857938@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Since I've updated to Natty...
I have not figured out the exact circumstances but sometimes when I wake the screen from blanking the GPU goes into an endless reset loop.  I can see the backlight turning on and off but otherwise the screen is black.  All the instances I can recall this happening, an OpenGL application is running.  Once this happens, I can still login via SSH and I can see that the Xorg process is using varying amounts of cpu around 20%.

I did not notice this problem on Lucid.  But, I also had KMS disabled on
Lucid.  This is not really an option on Natty.

In my syslog I see the following repeated over and over until I reboot:
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316114] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316121] ------------[ cut here ]------------
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316168] WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x2ea/0x350 [radeon]()
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316173] Hardware name: 8743CTO
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316177] GPU lockup (waiting for 0x001B56EC last fence id 0x001B56EB)
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316182] Modules linked in: binfmt_misc pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv rfcomm parport_pc ppdev ipt_REJECT sco xt_limit xt_tcpudp ipt_addrtype bnep l2cap xt_state ip6table_filter ip6_tables btusb bluetooth snd_hda_codec_analog nf_conntrack_netbios_ns thinkpad_acpi arc4 snd_hda_intel snd_hda_codec snd_hwdep nf_nat_irc snd_pcm nf_conntrack_irc snd_seq_midi nf_nat_ftp nf_nat iwl3945 snd_rawmidi snd_seq_midi_event radeon iwlcore ttm mac80211 drm_kms_helper pcmcia nf_conntrack_ipv4 snd_seq drm joydev nf_defrag_ipv4 nf_conntrack_ftp snd_timer nf_conntrack snd_seq_device iptable_filter i2c_algo_bit yenta_socket pcmcia_rsrc pcmcia_core nsc_ircc tp_smapi snd ip_tables cfg80211 psmouse thinkpad_ec serio_raw soundcore x_tables snd_page_alloc irda tpm_tis tpm tpm_bios crc_ccitt nvram lp video parport ahci libahci e1000e
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316319] Pid: 1115, comm: Xorg Not tainted 2.6.38-11-generic #48-Ubuntu
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316324] Call Trace:
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316339]  [<c104f9b2>] ? warn_slowpath_common+0x72/0xa0
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316376]  [<f84b87ba>] ? radeon_fence_wait+0x2ea/0x350 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316413]  [<f84b87ba>] ? radeon_fence_wait+0x2ea/0x350 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316421]  [<c104fa83>] ? warn_slowpath_fmt+0x33/0x40
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316459]  [<f84b87ba>] ? radeon_fence_wait+0x2ea/0x350 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316472]  [<c106d4d0>] ? autoremove_wake_function+0x0/0x50
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316513]  [<f84d042d>] ? radeon_ib_get+0xfd/0x1c0 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316554]  [<f84d142d>] ? copy_from_user+0xd/0x10 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316595]  [<f84d19f9>] ? radeon_cs_parser_init+0x249/0x2a0 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316637]  [<f84d1b63>] ? radeon_cs_ioctl+0x63/0x180 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316664]  [<f8352cd1>] ? drm_ioctl+0x1e1/0x470 [drm]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316712]  [<f84d1b00>] ? radeon_cs_ioctl+0x0/0x180 [radeon]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316724]  [<c112701c>] ? rw_verify_area+0x6c/0x130
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316747]  [<f8352af0>] ? drm_ioctl+0x0/0x470 [drm]
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316755]  [<c11369eb>] ? do_vfs_ioctl+0x7b/0x2e0
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316762]  [<c1136cd7>] ? sys_ioctl+0x87/0x90
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316770]  [<c150a4f4>] ? syscall_call+0x7/0xb
Sep 23 17:02:47 evo-pflaptop kernel: [179393.316776] ---[ end trace 91b1062c3f3057f4 ]---
Sep 23 17:02:47 evo-pflaptop kernel: [179393.317888] radeon 0000:01:00.0: GPU reset succeed
Sep 23 17:02:47 evo-pflaptop kernel: [179393.317896] radeon 0000:01:00.0: f2e57600 unpin not necessary
Sep 23 17:02:47 evo-pflaptop kernel: [179393.322149] [drm] radeon: 1 quad pipes, 1 z pipes initialized.
Sep 23 17:02:47 evo-pflaptop kernel: [179393.317896] radeon 0000:01:00.0: f2e57600 unpin not necessary
Sep 23 17:02:47 evo-pflaptop kernel: [179393.322149] [drm] radeon: 1 quad pipes, 1 z pipes initialized.
Sep 23 17:02:47 evo-pflaptop kernel: [179393.325121] [drm] PCIE GART of 512M enabled (table at 0x00040000).
Sep 23 17:02:47 evo-pflaptop kernel: [179393.325131] radeon 0000:01:00.0: WB enabled
Sep 23 17:02:47 evo-pflaptop kernel: [179393.325190] [drm] radeon: ring at 0x0000000008001000
Sep 23 17:02:47 evo-pflaptop kernel: [179393.518881] [drm:r100_ring_test] *ERROR* radeon: ring test failed (scratch(0x15E4)=0xCAFEDEAD)
Sep 23 17:02:47 evo-pflaptop kernel: [179393.518888] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).
Sep 23 17:02:47 evo-pflaptop kernel: [179393.518894] radeon 0000:01:00.0: failled initializing CP (-22).

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Fri Sep 23 18:40:22 2011
DistUpgraded: Log time: 2011-08-09 19:07:14.696723
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 tp-smapi, 0.40, 2.6.38-10-generic, i686: installed 
 tp-smapi, 0.40, 2.6.38-11-generic, i686: installed 
 vboxhost, 4.1.0, 2.6.38-10-generic, i686: installed 
 vboxhost, 4.1.0, 2.6.38-11-generic, i686: installed
GraphicsCard:
 ATI Technologies Inc Radeon Mobility X1400 [1002:7145] (prog-if 00 [VGA controller])
   Subsystem: Lenovo Thinkpad T60 model 2007 [17aa:2006]
Lsusb:
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 8743CTO
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=16f3669f-ef97-4016-a87f-33637a93d7ab ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: Upgraded to natty on 2011-08-10 (44 days ago)
dmi.bios.date: 04/01/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 7IET37WW (1.18 )
dmi.board.name: 8743CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7IET37WW(1.18):bd04/01/2010:svnLENOVO:pn8743CTO:pvrThinkPadT60:rvnLENOVO:rn8743CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 8743CTO
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 natty regression-update ubuntu

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https://bugs.launchpad.net/bugs/857938

Title:
  Endless GPU reset loop on wake from blanking screen

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