[Bug 73559] [hsw] KMS does not work on Dell XPS 8700

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73559

--- Comment #4 from Paulo Zanoni <przanoni at gmail.com> ---
Just to make sure:
After the "freeze", you can't even SSH to the machine, right? Pressing caps
lock/num lock won't trigger the Keyboard LEDs, right?

Can you please boot with nomodeset and then "cat /proc/cmdline" and paste it
here?

I find it really really weird that we only detected HDMI at the HW state
readout code, but then drm_enable_connectors thinks VGA is connected, then we
do this:

[  100.312604] [drm:drm_enable_connectors], connector 9 enabled? yes
[  100.312606] [drm:drm_enable_connectors], connector 12 enabled? no
[  100.312608] [drm:drm_enable_connectors], connector 15 enabled? no
[  100.312610] [drm:drm_enable_connectors], connector 17 enabled? yes
[  100.312612] [drm:drm_target_preferred], looking for cmdline mode on
connector 9
[  100.312614] [drm:drm_target_preferred], looking for preferred mode on
connector 9
[  100.312617] [drm:drm_target_preferred], found mode 1024x768
[  100.312619] [drm:drm_target_preferred], looking for cmdline mode on
connector 17
[  100.312621] [drm:drm_target_preferred], looking for preferred mode on
connector 17
[  100.312623] [drm:drm_target_preferred], found mode 1280x1024
[  100.312625] [drm:drm_setup_crtcs], picking CRTCs for 8192x8192 config
[  100.312629] [drm:drm_setup_crtcs], desired mode 1024x768 set on crtc 3
[  100.312631] [drm:drm_setup_crtcs], desired mode 1280x1024 set on crtc 5

Connector 17 is HDMI, but connector 9 is VGA. For some reason the DRM layer
things CRT is connected.

Just a quick test we could do, in case you're familiar with compiling/testing
Kernels: remove the "intel_crt_init()" call from intel_setup_outputs() from
intel_display.c. That would explain at leas that the problem is the bad CRT
detection.

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