Bug 36777 - radeon 0000:01:00.0: IH ring buffer overflow (0xFFFFFFFF, 15, 65550)
Summary: radeon 0000:01:00.0: IH ring buffer overflow (0xFFFFFFFF, 15, 65550)
Status: RESOLVED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
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Reported: 2011-05-02 09:13 UTC by Cedric Sodhi
Modified: 2011-10-12 23:38 UTC (History)
0 users

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Description Cedric Sodhi 2011-05-02 09:13:58 UTC 
VGASwitcheroo enabled hybrid setup with Intel Arrandale and Radeon CEDAR

01:00.0 0300: 1002:68e0 (rev ff) (prog-if ff)
	!!! Unknown header type 7f
	Kernel driver in use: radeon

(lspci -vn). When the Radeon is powered down and X is running dmesg is filled up with thousands of 

radeon 0000:01:00.0: IH ring buffer overflow (0xFFFFFFFF, 15, 65550)

which does not disappear, even if debug is disabled. I think the radeon driver does not understand that it's card is powered down. Can this be fixed?
Comment 1 Fabian Deutsch 2011-06-10 11:33:12 UTC 
There seems to be something up with "the ring", I've got a problem since post 2.6.35: https://bugzilla.redhat.com/show_bug.cgi?id=691326
Comment 2 Alex Deucher 2011-10-05 06:11:40 UTC 
I think this should be fixed in a newer kernel.  Can you try with a newer kernel?

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