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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [hsw] KMS does not work on Dell XPS 8700"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73559#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [hsw] KMS does not work on Dell XPS 8700"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73559">bug 73559</a>
from <span class="vcard"><a class="email" href="mailto:comes@naic.edu" title="comes@naic.edu">comes@naic.edu</a>
</span></b>
<pre>May be this will help:
If only one monitor is connected to the PC one fb device is created:
cat /sys/devices/pci0000:00/0000:00:02.0/graphics/fb0/name
inteldrmfb
But if I connect two monitor: DP1, HDMI2 then two framebuffers appears:
cat /sys/devices/platform/efifb.0/graphics/fb0/name
EFI VGA
cat /sys/devices/pci0000:00/0000:00:02.0/graphics/fb1/name
inteldrmfb
Can it be that this "EFI VGA" framebuffer is what makes drm_setup_crtcs() think
that a CRT is connected even if it isn't?
Also when two monitors are connected vt01 is unreadable
the background is a pattern of black and white vertical stripes
and the text is scrambled. vt02 and higher are ok.
cat /sys/devices/platform/efifb.0/graphics/fb0/virtual_size
640,350
this makes grub2 use such resolution to display the boot menu (with only
one monitor grub2 uses the proper monitor resolution).</pre>
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