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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - blank screen on OpenChrome with VIA VE900"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106392#c54">Comment # 54</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - blank screen on OpenChrome with VIA VE900"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106392">bug 106392</a>
from <span class="vcard"><a class="email" href="mailto:ptouchman@gmail.com" title="ptouchman@gmail.com">ptouchman@gmail.com</a>
</span></b>
<pre>I tried some more fiddling and was able to get a display on my Sansui SLED2900
that has no EDID on the VGA-1 (for whatever reason, I've tried a whole bunch of
different cables.)
I was able to get the Sansui to work with this workaround:
I boot debian 9.3 with these additional grub command line parameters:
drm_kms_helper.firmware_edid=edid/1280x1024.bin video=1280x1024e
and it acts differently than expected, but it tries to do mode 1152x864 (why
1152x864 I don't know)
I get a blank screen with "Not supported" on the Sansui.
I go to a text terminal with CTRL+ALT+1, login and try:
"xrandr -d :0" and it gives me some "Invalid MIT-Magic-cookie" message.
I stop the lightdm with "sudo services lightdm stop" which kills the xserver.
Then I do a startx from the command line.
I switch to a text terminal with CTRL+ALT+2, login and try:
"xrandr -d :0" and now I have access to the x server and it tells me the valid
modes available, 1360x768 is the native resolution of my Sansui.
"xrandr -d :0 --output VGA-1 --mode 1360x768" gives me the message
Xrandr: Configure crtc 0 failed
so
"chvt 1; sleep 2; xrandr -d :0 --output VGA-1 --mode 1360x768"
works and I get a visible display on my Sansui. Yes!
I'm going to post the xorg log.</pre>
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