[Bug 28857] New: radeon/M56GL: atombios stuck in loop while booting with KMS enabled

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28857

           Summary: radeon/M56GL: atombios stuck in loop while booting
                    with KMS enabled
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: jeffm@suse.com


Created an attachment (id=36639)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=36639)
dmesg

While booting a freshly installed 11.3 RC1 system with the following graphics
hardware, I end up with black screens and the displays are in low power mode.

ATI Technologies Inc M56GL [Mobility FireGL V5250]

If I boot with radeon.modeset=0, the problem clears up. The issue occurs with
both the radeon driver and the radeonhd driver. It also occurs with the current
11.3 Factory kernel (2.6.34) as well as the 2.6.35-rc3 master kernel. Nothing
in libdrm versions newer than openSUSE 11.3's 2.4.20 looks relevant.

I'll attach hwinfo, dmesg, and Xorg.0.log from the system while booted in KMS
mode.

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