[Bug 14810] ati driver sleeps for 1 second every 6 seconds with LCD display panel

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=14810





--- Comment #1 from Alex Deucher <agd5f at yahoo.com>  2008-03-04 11:41:58 PST ---
(In reply to comment #0)
> I have Dell Latitude C640 with an ATI display card and a LCD display (a normal
> feature for a laptop, if you ask me).  With the ATI driver for xorg that ships
> with ubuntu as xserver-xorg-video-ati_6.7.195-1ubuntu2_i386.deb, I got
> stop-start behaviour.  Every 6 seconds, there was a small delay.  
> 
> In my Xorg.0.log I get this every 6 seconds too:
> 
> enable montype: 2
> enable montype: 2
> enable montype: 2
> enable montype: 2
> enable montype: 2
> enable montype: 2

The driver doesn't do this by default.  It sounds like ubuntu must have process
running that does something every 6 seconds.

> I suspect that the "usleep" was put there for a reason, but it was not
> anticipated that it would get called every time the x server 
> checks whether a new monitor has been attached.  (Conceivably
> radeon_output->PanelPwrDly = 0 ; could work better)

The usleep is required to to bring the panel up reliably.


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