[Bug 42035] no way to turn off vsync

[Michal Suchanek]

On 27 October 2011 15:20, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Thu, Oct 27, 2011 at 03:03:34PM +0200, Michal Suchanek wrote:
>> 2011/10/27 Daniel Vetter <daniel at ffwll.ch>:
>> > On Wed, Oct 26, 2011 at 12:15:37PM +0200, Michel Dänzer wrote:
>> >> It's probably waiting for a DRM VBLANK event. The question then becomes
>> >> why that never arrives.
>> >
>> > I've just strolled through the code and afaics we don't kick any pending
>> > waiters when we disable the vsync. At least they'll immediately requeu
>> > themselves when the desired vblank hasn't arrived yet. I suspect the event
>> > code is suffering from the same issue.
>>
>> With a newer kernel the applications don't get stuck anymore, however.
>
> That's rather interesting. What's the last broken and earliest working
> version? I've tried to wade through the discussion but failed to find
> that.

For me Ubuntu 3.0.0-10 is broken and 3.0.0-13 works but I am not sure
what upstream version it corresponds to, if any.

Thanks

Michal