Bug 36817 - RV670 - Kernel fails to enable acceleration when RAM greater than 32-bit limit
Summary: RV670 - Kernel fails to enable acceleration when RAM greater than 32-bit limit
Status: RESOLVED INVALID
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2011-05-03 16:57 UTC by Fraggle
Modified: 2016-02-26 06:10 UTC (History)
1 user (show)

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Description Fraggle 2011-05-03 16:57:01 UTC 
I sure hope I'm in the right place...

Using a Radeon HD3870 that works fine under Windows (64-bit).  After a supposed initial success using a pre-release version of KMS drivers (which may be a red herring), I have been unable to get 3D acceleration on any Ubuntu release from Lucid, unless I use a non-PAE kernel (I have 4GB RAM).

My Ubuntu bug ticket (including logs) is here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/574884

Another bug that looks similar: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/657576

A similar looking bug with a similar workaround (which I'll shortly try on mine) on SUSE: http://web.archiveorange.com/archive/v/wmeLDauZzOL6SFQx1uKY
Comment 2 Christopher M. Penalver 2016-02-26 06:10:26 UTC 
Original reporter hasn't responded to downstream information request in 2 years.

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