Mailinglist Archive: radeonhd (353 mails)

[Egbert Eich <eich@xxxxxxx>]

Hi John,

Bridgman, John writes:
> Just guessing, but there are "reduced blanking" timings available for
> LCDs -- if you were using regular timing and your display needed a
> reduced blanking timing (usually indicated by an "R" in the modeline
> somewhere IIRC) that might explain the blinking.  

I don't think it's that easy. The mode line we use is the one supplied by
the device. 

I'm also not sure if digital displays really need reduced timings.
To my understanding reduced timings are a feature of digital displays:
they increase the duty cycle and thus allow lower frequencies by using
the fact that there is no need for a 'retrace' of the CR which requires
a non-zero amount of time due to the electrical properties of the 
coils on the tube.

However, let's verify, that we are really always using reduced timings.

Cheers,
        Egbert.
> -----Original Message-----
> From: Georges [mailto:radeonhd@xxxxxxxxxxxx] 
> Sent: Sunday, April 06, 2008 11:41 AM
> To: radeonhd@xxxxxxxxxxxx
> Subject: [radeonhd] 1600x1200 -> LCD blink
>
> Hi,
>
> When I use the 1600x1200 LCD native resolution, my LCD (Samsung 204b)
> blink If I use lower resolution it's ok.
>
> My card is a Sapphire HD3650, and radeonhd last from git.
>
> Is it possible to have 1600x1200 not blinking?
>
> Thanks
>
> Georges
>
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