[Bug 17682] HD3200/HDMI shows up-scaled part of the screen

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17682


Stefan Becker <stefan.becker at nokia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|HD3200/HDMI shows only part |HD3200/HDMI shows up-scaled
                   |of the screen               |part of the screen




--- Comment #5 from Stefan Becker <stefan.becker at nokia.com>  2008-09-20 23:56:50 PST ---
Thanks for the hint, that's exactly how it looks like. It probably also
explains the "moire" pattern in 1920x1080.

I've updated the bug summary accordingly.

One explanation could be that the driver doesn't touch the R700 scaler
registers at all and therefore the values set up by the BIOS are still active.
The 80x25 VGA display (BIOS, Linux VT) is up-scaled to 1920x1080 at 60 (16:9) and
fits exactly to the display. When X switches to the graphics mode the output
will then be up-scaled too :-/

Can you please share what registers you found that control the R700 scaler? Did
you find out how to disable it?

I probably also need to check the code in the driver that produces this output
in the X log:

(II) RADEON(0): ParseTable said: CD_SUCCESS
(II) RADEON(0): Call to AtomBIOS Exec succeeded
scaler 0 setup success


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