gtk+ and randr

[Alex Deucher]

On Tue, Jul 22, 2008 at 4:18 AM, Eric Piel <E.A.B.Piel at tudelft.nl> wrote:
> Alex Deucher schreef:
>>
>> On Mon, Jul 21, 2008 at 6:39 PM, Ben Gamari <ben at mw0.ath.cx> wrote:
>>>
>>> On Intel hardware it seems to probe the outputs and re-acquire EDID
>>> information, which in itself seems to usually cause loss of sync. It
>>> seems this is what XRRGetScreenResources() is supposed to do so I really
>>> don't see any way to avoid the cost.
>>
>> If you have monitors with EDIDs plugged into your connectors, then
>> you're fine.  if you have nothing on one or more connectors or a
>> monitor without an EDID, you may get flickering as the driver attempts
>> to use load detection to sense the presence of a monitor since there
>> is no EDID.
>
> With my i965 and a monitor _with_ EDID connected to the VGA output, I do get
> flickering (the screen turns black for one second). So, it seems the
> flickering happens all the time. Is it a bug in the intel driver? Or maybe
> it's because there is also a TV output? (that would be nasty because the
> laptop don't even have the plug!)

TV is load detection only, so it's probably the tv port.  I suspect
your laptop needs a quirk to ignore the tv connector.

Alex