[Bug 31972] New: 2.6.38.1: radeon hd 6870: kms, hdmi, signal is correct only for 1-2 seconds

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=31972

           Summary: 2.6.38.1: radeon hd 6870: kms, hdmi, signal is correct
                    only for 1-2 seconds
           Product: Drivers
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: arekm at maven.pl
        Regression: No


Created an attachment (id=52182)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=52182)
dmesg with messages

I'm using 2.6.38.1 with radeon hd 6870
(http://www.gigabyte.com/products/product-page.aspx?pid=3615#ov) connected only
to toshiba regza tv with HDMI connector. Nothing else is connected.

After modprobe radeon KMS kicks in, resolution is changed and everything looks
fine for 1-2 seconds. Then signal is lost according to tv and there are tons
of:
"[drm:atom_dp_get_link_status] *ERROR* displayport link status failed", some
kworker eats 90% of cpu and fans go up.

dmesg attached.

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