[Bug 27225] New: Radeon KMS fails on Xpress 200M

[<bug...@fr...>]

http://bugs.freedesktop.org/show_bug.cgi?id=27225

           Summary: Radeon KMS fails on Xpress 200M
           Product: DRI
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri...@li...
        ReportedBy: maa...@gm...


On an Ubuntu Lucid installation (at the moment of writing still beta) KMS
should be enabled on the Radeon Xpress 200M.
But intialization of KMS does fail with the lines in attachment kms_fail.txt

Apparently the driver doesn't like the card's memory, which I believe is an IGP
card without memory itself.

Next thing I tried was passing 'radeon agpmode=-1' to the module, to force it
into PCI mode.
(even though the card does say in lshw: 
description: VGA compatible controller
                product: RC410 [Radeon Xpress 200M]
                vendor: ATI Technologies Inc
                physical id: 5
                bus info: pci@0000:01:05.0
                version: 00
                width: 32 bits
                clock: 66MHz
                capabilities: agp agp-3.0 pm msi cap_list
                configuration: latency=64 mingnt=8
                resources: memory:c0000000-cfffffff(prefetchable)
ioport:9800(size=256) memory:fe1f0000-fe1fffff
memory:fe1c0000fe1dffff(prefetchable)

and so I think is an AGP card and not a PCI(E) card)

anyhow, this does seem to improve the situation, because now can KMS be loaded.
But a new error appears: it says it fails the r100_ring_test with 0xCAFEDEAD. I
don't know why it fails, I found multiple people with this problem on the
internet, but nobody with a fix.
The log of this one I will attach as kms_forceagp-1_fail.txt


Notes:
Tested: kernel 2.6.32(from lucid with DRM code), 2.6.33 and 2.6.34-rc1
Tested: DRM 2.4.18 (from lucid), 2.4.19+git20100318 (xorg-edgers repository)
I load radeon in /etc/modules to force the loading of the driver in time to
assure that the firmware does load in time (recommended by developers)

Already thanks for your time, if you need more information/testing I am willing
to of course.


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