Re: Linux 3.8-rc2

[Alexey Zaytsev]

On Fri, Jan 4, 2013 at 12:45 AM, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> On Thu, 3 Jan 2013 13:32:04 -0800, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>> On Thu, Jan 3, 2013 at 1:09 PM, Alexey Zaytsev <alexey.zaytsev@xxxxxxxxx> wrote:
>> >
>> > i915 got broken on my machine (Lenovo ThinkPad SL500) by this -rc. The screen
>> > goes blank after loading the module. I've bisected the problem to
>> > b0a2658acb5bf9ca86b4aab011b7106de3af0add "drm/i915: don't disable
>> > disconnected outputs".
>>
>> Hmm. Daniel - should I just revert it, or do you have a patch to
>> possibly fix the divide-by-zero error in g4x_compute_wm0() (which may
>> involve not getting that deep in the call chain to begin with or
>> whatever)? Maybe that fixes the blank screen too without a revert..
>
> The issue appears to be a disagreement between intel_crtc->active, an
> attached framebuffer and there not being a valid mode set on the crtc.
>
> It looks like we end up in that situation with further confusion over
> intel_crtc->base.enabled vs intel_crtc->active. I suspect the answer is
> something like:
>

Chris: The patch does not seem to have any effect on the problem.

Peter: I've attached the dmesgs, as well as the diff between the
interesting parts. The patch does not seem to make any difference
there.

Attachment: dmesg-working.gz
Description: GNU Zip compressed data

Attachment: dmesg-broken.gz
Description: GNU Zip compressed data

Attachment: dmesg-broken-patched.gz
Description: GNU Zip compressed data

Attachment: dmesg-working-broken.diff
Description: Binary data