Side note about wrong monitor size [was Re: New monitor, pink vertical line ...]

[John Stoffel]

Dave> John Stoffel wrote:
>> What happens if you put back in the 58xx card and clear out the
>> Monitor section from your xorg.conf file completely?  Let the KMS
>> figure out the monitor settings on it's own?  Do you get the screwy
>> pink line then?

Dave> The HD 5750 gives me the pink line before X even runs!  The
Dave> problem, I believe, lies with the HDMI support in the Evergreen
Dave> DRM code.  I am not the only Evergreen user to be affected by
Dave> this.

Ahh, then never mind my suggestion.  It's obviously a more low-level
issue, probably in the AtomBIOS parsing layer.  

Dave> Just for kicks, I removed xorg.conf completely.  The Xorg.0.log
Dave> files produced were barely different: the changes mostly have to
Dave> do with autodetection of Default Screen and loss of Monitor
Dave> sections.  Interestingly, the removal of the Monitor sections
Dave> causes this change in the Xorg.0.log output:

Dave>      -(**) RADEON(0): Display dimensions: (593, 371) mm
Dave>      -(**) RADEON(0): DPI set to (82, 82)
Dave>      +(==) RADEON(0): DPI set to (96, 96)

Dave> The first two lines are expected, since I removed the monitor section 
Dave> that specified the physical size of the monitor.  The line replacing 
Dave> them ought to be indicating a DPI of 82 since the correct resolution and 
Dave> screen size are detected:

Dave>      (II) RADEON(0): clock: 154.0 MHz   Image Size:  593 x 371 mm

Dave> Instead, either the radeon driver or the X server is altering the 
Dave> physical screen size to this:

Dave>      (II) RADEON(0): Setting screen physical size to 508 x 317

Dave> This also happens with my HD 4850 (even with my old xorg.conf
Dave> being used) if I use the DVI-to-HDMI converter cable.  With the
Dave> new HDMI cable being used (on HD 4850), I get the correct
Dave> physical size: 593x371.

Dave> Baffling....

Not really, look at the change in DPI.  I bet that's the difference
between the 82 and 96 DPI settings. 

>> Good lukc, and thanks for all your testing.  I'm slowly getting
>> tempted to upgrade from my x1650 card.  :]

Dave> Thanks.  I purchased the HD 5750 knowing that Linux open driver
Dave> support would be lousy or nonexistent.  Or, stated another way,
Dave> I knew that support was being newly introduced, and it was my
Dave> big chance to contribute by testing the new support as it is
Dave> developed!

I understand!  I wish I had the time to get into the programming
deeper, but work and family are keeping me limited.  

John