Modeline problem with Radeon KMS

[Alex Deucher]

On Wed, Jun 8, 2011 at 11:31 AM, Meelis Roos <mroos at linux.ee> wrote:
>> > I have LG Flatron F900P CRT monitor. X drivers work fine, nouveau KMS
>> > works fine but Radeon KMS selects a videomode that is out of spec for
>> > monitor. This is not a regression - this hardware combination has never
>> > worked for me yet with radeon KMS. The result is same for Radeon 7000
>> > (RV100, currently installed) and Radeon 9200 series card.
>
> Umm, I guess I forgot one important aspect. When X comes up, it finds a
> good video mode and gets a picture. It's just the text consoles that
> have no picture.
>
> In the console, it tells it's using 352x132 console. This translates
> with 8x16 font to 2816x2112 and 9x16 font to 3168x2112 if I calculated
> the right thing.
>
> Running fbset remotely verifies this:
>
> # fbset -s </dev/tty1
>
> mode "2816x2114"
>    geometry 2816 2114 2816 2114 8
>    timings 0 0 0 0 0 0 0
>    accel true
>    rgba 8/0,8/0,8/0,0/0
> endmode
>
> So it decides this modeline is usable for the console while it is not.
>

Ah, ok.  yeah, that mode has a much higher clock than those chips can
handle.  Where is that mode even coming from?  I don't see it in the
EDID.  The attached patch should filter out that mode.

Alex
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