Bug 6302 - radeon driver doesn't detect 256MB graphic memory in Radeon9700
Summary: radeon driver doesn't detect 256MB graphic memory in Radeon9700
Status: RESOLVED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: General (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: low normal
Assignee: Default DRI bug account
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Reported: 2006-03-17 23:23 UTC by CIJOML CIJOMLovic CIJOMLov
Modified: 2006-03-17 08:39 UTC (History)
0 users

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Description CIJOML CIJOMLovic CIJOMLov 2006-03-17 23:23:07 UTC 
Hello,

My laptop has ATI Radeon9700 with 256MB graphic memory, but radeon driver 
detects only 128MB. Also official linux ATI driver fglx detects only 128MB, 
but Windows XP drivers detects those 256MB.

Please fix it to have in linux 256MB available through radeon driver.

Thanks a lot

Michal
Comment 1 Roland Scheidegger 2006-03-18 00:08:36 UTC 
You could try with latest radeon ddx & drm cvs, some issues with setting up the
memory map are fixed since very recently. Or install a driver snapshot instead
of using cvs. Though I think some mobility parts may have one memory channel
deactivated completely, in which case it wouldn't help (I believe mobility 9700
always have a 128bit memory interface, if you see it detected as 64bit with
latest driver then that is probably the case).
Comment 2 CIJOML CIJOMLovic CIJOMLov 2006-03-18 01:23:17 UTC 
I use X.org 6.9 from Debian testing. So are there any newer debian packages with
this? I would like test it...
Comment 3 Alex Deucher 2006-03-18 03:39:12 UTC 
Fixed in cvs or on the ati-1.0-branch.  Due to the way the apertures are set up
and some chip bugs, memory beyond 128 MB is not always CPU accessible. 
Eventually we can work around those cases by using the extended memory for GPU
only things like textures.  The driver has always been able to detect the full
amount of vram, we just used to clip it at 128 MB.  this is the behavior you are
seeing.

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