[Openchrome-users] No lunch with OpenChrome on VX900

[Xavier Bachelot]

On 05/15/2012 08:46 PM, Amit Uttamchandani wrote:
> On Mon, May 14, 2012 at 11:03:34AM -0700, Amit Uttamchandani wrote:
> 
> [snip]
> 
>> Anyways, so at this point in order to get a higher resolution, I tried
>> using xrandr scaling:
>>
>> xrandr --output LVDS-2 --fb 1300x740 --scale 1.62x1.54
>>
>> But got the following error:
>>
>> xrandr: Configure crtc 0 failed
>>
> 
> Looked at the code under kms_branch/via_driver.c and the error comes from:
> 
> via_xf86crtc_resize()
> 
> Specifically, during the call to:
> 
> xf86SetDesiredModes(scrn)
> 
> The output of the above xrandr call with verbose mode turned on:
> 
> xrandr: Configure crtc 0 failed
> crtc 0: disable
> crtc 1: disable
> screen 0: revert
> crtc 0: revert
> crtc 1: revert
> 
> Thanks,
> Amit

I'll let James comment on this particular point, this is beyond my
knowledge.

However, I talked with him a bit about the bad resolution detection for
the LVDS panel with kms_branch. It would be nice if you can provide a
dump of the registers while in the virtual console (that is without X
running). You need to give the --enable-viaregtool switch to the
configure script, then once built and installed, run 'via_regs_dump
-dpm' and post the output. It would help to enhance the LVDS resolution
detection code.

Regards,
Xavier