[Bug 16850] New: Spurious "No irq handler for vector" kernel warnings

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16850

           Summary: Spurious "No irq handler for vector" kernel warnings
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: realnc at gmail.com
         QAContact: xorg-team at lists.x.org


Driver: xf86-video-ati 6.9.0
X.Org: 1.4.99.905
Linux kernel: 2.6.26
Hardware: Radeon X1950XT PCI-e (r580)

Switching from X to a vesafb console works but produces "do_IRQ" kernel
warnings:

  [drm] Setting GART location based on new memory map
  [drm] Loading R500 Microcode
  [drm] Num pipes: 4
  [drm] writeback test succeeded in 1 usecs
  do_IRQ: 0.83 No irq handler for vector
  do_IRQ: 0.83 No irq handler for vector
  do_IRQ: 0.83 No irq handler for vector

This is 100% reproducible when switching to a console.  No warnings when
switching back to X.

When enabling compiz-fusion (it works), the same warnings appear but more often
plus a new "__ratelimit: 5 messages suppressed" warning:

  do_IRQ: 0.83 No irq handler for vector
  do_IRQ: 0.83 No irq handler for vector
  [repeated 8 more times]
__ratelimit: 5 messages suppressed
  do_IRQ: 0.83 No irq handler for vector
  do_IRQ: 0.83 No irq handler for vector

My Xorg.0.log: http://realnc.pastebin.com/m28ee9247
My xorg.conf: http://realnc.pastebin.com/m134032cc
(I'm also attaching them.)


Furthermore, trying to enable v-sync (vblank_mode 1) results in this error when 
trying to run glxgears:

   do_wait: drmWaitVBlank returned -1, IRQs don't seem to be
   working correctly.

glxgears "runs", but with sub-1FPS speed:

   3 frames in 6.0 seconds =  0.500 FPS
   2 frames in 6.0 seconds =  0.333 FPS
   2 frames in 6.0 seconds =  0.333 FPS
   2 frames in 6.0 seconds =  0.333 FPS
   2 frames in 6.0 seconds =  0.333 FPS

Should I open a new bug for this one?


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