On 05.01.2016 04:08, Thomas Richter wrote:
> Hi folks,
> 
> I don't seem to be able to enable the DVI-I output of an old FX 5200
> behind a KVM switch. Autodetection works fine if the FX 5200 DVI output
> is switched to the monitor, but when it is not, I have not found a way
> to force-enable it.
> 
> Here is what I tried:
> 
> *) used the video=DVI-I-1:1280x1024-24@60e kernel parameter
> (framebuffer still sits at 1024x768)
> 
> *) used "options drm_kms_helper edid-firmware=edid/edid.bin"
> in /etc/modprobe.d/nouveau.conf. "no initrd here, drm-kms-helper.ko is
> loaded during bootstrap)
> 
> *) downloaded the edid from the monitor and validated its correctness.
> I placed the edid data into /lib/firmware/edid/edid.bin, and added the
> module option "options drm_kms_helper edid-firmware=edid/edid.bin"
> 

append to kernel cmdline:
drm_kms_helper.edid_firmware=DVI-I-1:edid/edid.bin

$ cat /proc/cmdline
... drm_kms_helper.edid_firmware=DVI-I-1:edid/edid.bin ...


> as one can see from
> "/sys/module/drm_kms_helper/parameters/edid_firmware", the parameter is
> accepted, but does not resolve the problem. Framebuffer stays at
> 1024x768, and "xinit" does not give any display.
> 
> Any hints appreciated. It would be very helpful to have a working display.
> 
> Greetings,
>       Thomas
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