[Bug 27478] Radeon gamma bug, display too bright when using DVI-VGA adapter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27478

--- Comment #12 from Alex Deucher <agd5f at yahoo.com> 2010-04-06 08:13:19 PDT ---
(In reply to comment #10)
> >that looks correct.  Does:
> >radeontool regset TV_DAC_CNTL 0x07280043
> >help?
> 
> Nope, has no effect. - unless I need to restart X in order for it to take
> effect. (I did not restart X)
> 

No need to restart X.  what port are you using for your problematic monitor? 
VGA?  DVI?

> >You'll need the pci bus id from lspci, e.g.,
> >01:05.0 VGA compatible controller: ATI Technologies Inc RS690
> >^^^^^^^
> >It will have some leading zeros in sysfs.
> >
> >cd /sys/bus/pci/devices/<pci bus id>
> >echo 1 > rom
> >cat rom > /tmp/vbios.rom
> >echo 0 > rom
> 
> Ok, I feel inept here. I preformed the above as root, and I'm not sure what I
> should be posting as a result. do you want the contents of
> /sys/bus/pci/devices/0000:01:00.0/rom ? 

yes.  It's a binary file.

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