radeon mobility x1600 broken since 3.4.0-rc6 (bisected)

[Andrea]

On 08/29/2012 10:11 AM, Hausensteiner Keg wrote:
> On 27/08/12 21:04, Hausensteiner Keg wrote:
>> On 27/08/12 20:29, Jerome Glisse wrote:
>>> On Sun, Aug 26, 2012 at 8:34 PM, Hausensteiner Keg <skitching at apache.org> wrote:
>>>> ...
>>> Does patch
>>>
>>> http://people.freedesktop.org/~glisse/0001-drm-radeon-extra-type-safe-for-fence-emission.patch
>>>
>>> Helps ?
>>
>> Thanks Jerome. Will try patch tonight or tomorrow morning.
>>
>> How do I check whether the radeon is on an AGP bus?
>> The lspci output does not mention AGP; line for video controller is:
>>   01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI M56P [Radeon Mobility
>> X1600]
>> The "lshw" output also shows no signs of AGP.
>>
>> The dmesg output contains "[0.909546] Linux agpgart interface v0.103" but otherwise no mention of
>> "agp" or "AGP".
>>
>> By the way: tested the 3.5.3 release made today : still corrupt graphics. And the v3.5 release
>> (which was oddly working) also showed the same corrupt graphics as soon as I forced a rebuild of
>> the initrd - maybe an older radeon module somehow ended up in the initrd built by "make-kpkg
>> --initrd".
>>
> 
> Patch 0001-drm-radeon-extra-type-safe-for-fence-emission applies cleanly to both 3.5.3 and
> 3.6.0-rc3, but makes no difference in either case.
> 
> I've done some more bisecting, and the full sequence is:
> 
> * Prior to commit bb635567 ("convert fence to uint64_t v4") all works fine.
> * Commit bb635567 causes system to freeze on Plymouth startup.
> * The following commit (3b7a2b24, "rework fence handling, drop fence list v7") causes Plymouth to
> work again, but causes graphics corruption on greeter screen. Pressing ctrl-alt-f2 immediately
> displays a virtual console correctly, and the system is useable. However any attempt to use the
> mouse on the greeter screen triggers further graphics corruption, and system appears to hang.
> 
> This situation continues up to and including 3.5.3.
> 
> In the 3.6 dev cycle, the corruption issue continues up to 9c19415c. However the following commit,
> 876dc9f3 "remove radeon_fence_create" instead causes the screen to go black immediately after
> plymouth completes (ie when greeter screen is expected), and ctrl-alt-f2 has no effect.
> 
> FWIW, looks like two separate issues to me, with 876dc9f3 masking the earlier one..

Hi,

we are having the some issue with other radeon cards. you can check bug 54129 (and the one linked
there).
I have no hangs (yet), just big screen corruptions.

I have not found the 2nd issue at 876dc9f3. but I will check as soon as I can.
For me v3.6-rc3 is the same as 3b7a2b24.

I my case switching off KMS, makes the corruption disappear (but I loose XV).

To begin with, it would be nice if we could sort out if the problem comes from bb635567 or 3b7a2b24,
but I have the same black screen after the penguin logo (with Ctrl-Alt-Del working).

Andrea