[Nouveau] [Bug 34741] New: Freezes every 10 seconds when polling DP connections (by default)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34741

           Summary: Freezes every 10 seconds when polling DP connections
                    (by default)
           Product: xorg
           Version: unspecified
          Platform: All
        OS/Version: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: homyur at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=43839)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=43839)
dmesg output

Ubuntu 11.04 Alpha 2
HP EliteBook 8440p
Quadro NVS 3100M

If "drm_kms_helper poll" option is enabled (by default), the system freezes for
0.3 seconds every 10 seconds when polling DP connections.

dmesg output:
  ...
  [  242.324730] [drm] nouveau 0000:01:00.0: nouveau_dp_auxch:489 - ch 0 cmd 4
addr 0x50 len 1
  [  242.482252] [drm:output_poll_execute], [CONNECTOR:11:DP-1] status updated
from 2 to 2
  [  242.482261] [drm] nouveau 0000:01:00.0: nouveau_dp_auxch:489 - ch 2 cmd 4
addr 0x50 len 1
  [  242.641851] [drm:output_poll_execute], [CONNECTOR:14:DP-2] status updated
from 2 to 2
  ...

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