patch: add support for CustomEDID to radeon
skeggsb at gmail.com
Thu Sep 10 22:59:57 PDT 2009
On Fri, 2009-09-11 at 14:04 +1000, Dave Airlie wrote:
> On Fri, Sep 11, 2009 at 1:46 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> > 2009/9/10 Csillag Kristof <csillag.kristof at united-consult.hu>:
> >> Hi all,
> >> As I have mentioned a few days earlier, I have encountered a Samsung
> >> 214T monitor,
> >> which is unable to properly use DDC when connected via DVI, but works
> >> fine via VGA.
> >> I could not get it to work with the Radeon driver, but the proprietary
> >> NVIDIA driver
> >> had an option to force-feed the driver with custom EDID data from a
> >> file, instead of DDC,
> >> so I could use the monitor with NVIDIA.
> >> However, I wanted the Radeon driver, so I have added the same option to
> >> the radeon driver.
> >> It works for me; if you consider this useful, please add to the official
> >> branch.
> >> * * *
> >> Here is how I use it:
> >> 1. Connect the monitor to the PC using VGA
> >> 2. get-edid > /root/Samsung_214T.edid
> >> 3. add to xorg.conf: Option "CustomEDID"
> >> "DVI-0:/root/Samsung_214T.edid"
> >> 4. Connect the monitor to the PC using DVI
> >> 5. Restart X
> >> ... and it work.s
> >> As far as I can tell, there is no other way to make this monitor work
> >> with this driver,
> >> so this is very important to me; however, I am not sure how many people are
> >> blessed with such broken hardware, so I can not estimate the real importance
> >> of the problem.
> >> * * *
> >> Please let me know what do you think!
> > Great patch! thanks for doing this. I've made some small
> > improvements to it. Please test this patch and let me know and I'll
> > go ahead and commit it.
> /me wonders if this could be in the server at all.
/me wonders how this could be done for KMS drivers, abuse the firmware
> > Thanks,
> > Alex
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