Regressions when upgrading 7.2 -> 7.4, ATI Radeon 9250 PCI

Alex Deucher alexdeucher at
Sun Apr 19 15:35:30 PDT 2009

On Sun, Apr 19, 2009 at 5:01 PM, Jeremy Henty <onepoint at> wrote:
> On Sun, Apr 19, 2009 at 02:54:13PM -0400, Alex Deucher wrote:
>> On Sun, Apr 19, 2009 at 2:33 PM, Jeremy Henty <onepoint at> wrote:
>> >
>> > On Sun, Apr 19, 2009 at 12:49:56PM -0400, Alex Deucher wrote:
>> >
>> >> Does your monitor  support 1600x1200?   We'd have to  add a quirk
>> >> for your monitor if the 1600x1200 mode is indeed bogus.
>> >
>> > According  the  manual  it supports  1600x1200 at 80Hz,  but  I  have
>> > never  pushed  it   that  far.    (I'm  squinting   enough  as  it
>> >  is.  :-)  It's an Iiyama Vision Master 450.
> OK, setting Modes to "1600x1200" does  not work - the screen blanks as
> before.  I don't know if tweaking sync rates etc. might fix it, but as
> it stands it does not work.  Latest conf and log attached.
>> > Are  any  of  these  problems  to   do  with  my  card  not  being
>> > recognised, or is that a separate issue?
>> These  are all  related  to the  EDID  in your  monitor.  First  the
>> 1600x1200 mode it  announces doesn't seem to work,  secondly, it has
>> bogus size data:  54 x 3688 mm.  The bogus size  data is what causes
>> the  DPI  to  be  calculated  incorrectly  which  causes  your  font
>> problems.
> OK, that's clear. Can the bogus size data be fixed with a quirk too?

Yes.  There are already quite a few quirks for similarly busted EDIDs.
 Please file a bug:
and include your xorg logs and configs and we'll get it fixed up.


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