[Openchrome-users] [openChrome] #252: OpenChrome & Screen savers

[OpenChrome Trac]

#252: OpenChrome & Screen savers
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Reporter:  Danix803                       |        Owner:  somebody
    Type:  defect                         |       Status:  new     
Priority:  critical                       |    Component:  xdriver 
 Version:  0.2.903                        |   Resolution:          
Keywords:  DRM crash screensaver AGP DMA  |  
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Changes (by gringinho):

  * keywords:  => DRM crash screensaver AGP DMA
  * priority:  major => critical


Comment:

 I have a similar problem and have been experiencing this with various
 openchrome releases (0.2.900 , 0.2.901 , 0.2.902 , 0.2.903) and different
 kernels (2.6.22 - 2.6.26). I use Debian Etch 4.0 with some backports and
 KDE 3.5.7, Mesa 6.5.1.


 I first thought there were some other problems, but recently looked into
 it more. With the 0.2.902 release and kernel 2.6.25 as well as 0.2.903 +
 2.6.26 , I enabled the EnableAGPDMA option. That made it possible to see
 some more immediate crashes, when going into the KDE control centre and
 looking at the ScreenSaver section. With the miniature screensaver running
 in the control centre, the screen started having artifacts indicating some
 memory overwrite, and it locked up - hard and similar to how it locks up
 after having the screensaver running for some time. I am using the OpenGL
 screensaver "Flurry". When I flipped through different OpenGL screensavers
 in the KDE control centre, the screen artifacts and lock-up happened very
 quickly. I was able to go to a virtual console immediately when artifacts
 appeared, and looked at logs etc. When I went back to X, it locked hard.

 When it locks up, other processes - audio, network etc. are running
 normally.

 I looked into the /var/log/kern.log and found the following:


 Sep  6 04:37:19 lobo kernel: [   62.006558] [drm] Initialized drm 1.1.0
 20060810
 Sep  6 04:37:19 lobo kernel: [   62.042998] ACPI: PCI Interrupt
 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
 Sep  6 04:37:19 lobo kernel: [   62.042998] [drm] Initialized via 2.11.1
 20070202 on minor 0
 Sep  6 04:37:19 lobo kernel: [   62.091211] agpgart: Found an AGP 3.5
 compliant device at 0000:00:00.0.
 Sep  6 04:37:19 lobo kernel: [   62.091211] agpgart: Putting AGP V3 device
 at 0000:00:00.0 into 8x mode
 Sep  6 04:37:19 lobo kernel: [   62.091211] agpgart: Putting AGP V3 device
 at 0000:01:00.0 into 8x mode
 Sep  6 04:39:01 lobo kernel: [  177.731472] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1fca800, 0xd1fc9800 0x00000000
 Sep  6 04:39:01 lobo kernel: [  177.731545] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1fcb800, 0xd1fc9800 0x00000000
 Sep  6 04:39:01 lobo kernel: [  177.731589] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1fcc800, 0xd1fc9800 0x00000000

 snip...

 Sep  6 04:39:42 lobo kernel: [  218.932883] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1eb0200, 0xd1fc9800 0x00000000
 Sep  6 04:39:42 lobo kernel: [  218.932912] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1eb0400, 0xd1fc9800 0x00000000
 Sep  6 04:39:42 lobo kernel: [  218.933006] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1eb0600, 0xd1fc9800 0x00000000
 Sep  6 04:39:43 lobo kernel: [  219.805870] [drm:via_hook_segment] *ERROR*
 Paused at incorrect address. 0xd1eb0800, 0xd1fc9800 0x00000000


 The lockup after inactivity has happened with 0.2.900 - 0.2.903 and
 with/without EnableAGPDMA - it was only easier to provoke with
 EnableAGPDMA and also showed visual artifacts. Before enabling AGPDMA, the
 monitor would be in power-saving mode or without sync. When it locks up
 hard, the X server becomes unresponsive to everything - all key input is
 frozen, even Ctrl-Alt-Backspace etc.

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Ticket URL: <http://www.openchrome.org/trac/ticket/252#comment:1>
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