[Bug 101671] "classic" *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101671

            Bug ID: 101671
           Summary: "classic" *ERROR* radeon: ring 0 test failed
                    (scratch(0x8504)=0xCAFEDEAD)
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: lyssdod at gmail.com

Hi guys,

This error goes for a very long time. I have a hybrid graphics laptop (sandy
bridge + radeon), and the only case radeon worked was fglrx. I'm using Gentoo
and they have recently dropped any support for fglrx (mostly because AMD and
Xorg had), so I tried fresh installation just to get some luck - and it failed
exactly as before. Trivia:

- radeon and i915 as modules;
- power on;
- after login manager shows a pic, everything hangs deadly;
- using netconsole I was able to get dmesg error when everything freezes:

[  470.521009] [drm] PCIE gen 2 link speeds already enabled
[  470.522846] radeon 0000:01:00.0: No VRAM object for PCIE GART.
[  470.523493] [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed
on resume

I provide detailed system info shortly. Thanks!

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