[Bug 538119] [NEW] 2.6.32-16.25 video corruption on radeon

[/dev/null]

Public bug reported:

I'm running Lucid amd64 on the following hardware:

        Manufacturer: TOSHIBA
        Product Name: Satellite T130D
        Version: PST3LC-001006

01:05.0 VGA compatible controller: ATI Technologies Inc RS780M/RS780MN
[Radeon HD 3200 Graphics]

Since linux-image 2.6.32-16.25 (I tried the kernel just before this one), when kernel initialize video drivers the display is somewhat corrupted. 1 pixel height ~ 100px width blue lines move around on the screen. It cover ~1% of the screen all the time. 
It do not appear if it's only in regular 80x24 console.

If I prevent framebuffer to initialize, the symptoms appears when X
start.

I tried various mainline kernel with version taken here http://kernel.ubuntu.com/~kernel-ppa/mainline/
and thing is being fixed in kernel linux-image-2.6.34-020634rc1-generic.

I diff'ed dmesg output between the latest working kernel compared to the
broken one, here is what I see:

> input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:2c/LNXVIDEO:01/input/input5
< input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:2c/LNXVIDEO:01/input/input6

> platform radeon_cp.0: firmware: requesting radeon/R600_rlc.bin

< EDAC MC: Ver: 2.1.0 Feb 20 2010
< EDAC amd64_edac: Ver: 3.2.0 Feb 20 2010
< EDAC amd64: This node reports that Memory ECC is currently disabled, set F3x44[22] (0000:00:18.3).
< EDAC amd64: WARNING: ECC is disabled by BIOS. Module will NOT be loaded.
< Either Enable ECC in the BIOS, or set 'ecc_enable_override'.
< Also, use of the override can cause unknown side effects.
< amd64_edac: probe of 0000:00:18.2 failed with error -22
---
> EDAC MC: Ver: 2.1.0 Mar 9 2010
> EDAC amd64_edac: Ver: 3.2.0 Mar 9 2010
> EDAC amd64: This node reports that Memory ECC is currently disabled, set F3x44[22] (0000:00:18.3).
> EDAC amd64: ECC disabled in the BIOS or no ECC capability, module will not load.
> Either enable ECC checking or force module loading by setting 'ecc_enable_override'.
> (Note that use of the override may cause unknown side effects.)
> amd64_edac: probe of 0000:00:18.2 failed with error -22

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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2.6.32-16.25 video corruption on radeon
https://bugs.launchpad.net/bugs/538119
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