[Bug 350399] Re: Xserver black screen on 3/28/09 update of Jaunty

[Craig McDaniel]

Thanks for the suggestions Bryce. My main problem is solved for now, but
some mysteries remain:

First, I disabled gdm to diagnose. I downgraded to the previous versions
of xserver-xorg-core and xserver-common using "dpkg -i
/var/cache/apt/archive/<package>.deb" but continued to get a black
screen when starting X manually.

Mystery #1: Finally I tried enabling gdm again and it worked! I switched
back to the latest xserver-xorg-core and xserver-common and it still
worked! Other than adding the additional xserver-xorg-video-intel-dbg
package, I should be back to the same configuration as when the issue
first occurred.

Mystery #2: I still don't understand why I can't start the X server
manually. It always works when using "/etc/init.d/gdm start". When I
kill gdm and try to start X using "/usr/X11R6/bin/X :0" or "startx"
nothing but a black screen appears. I even tried duplicating the way gdm
runs X, but still had no luck:

/usr/X11R6/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten
tcp vt7

gdm is doing something to make X work that I can't reproduce. If I can
ever figure out how to start X manually, it may help me resolve the
issue with resuming from a suspend. I have attached various log files.
The main difference between the Xorg.0.log files is that the one that
broken one doesn't show this section:

(II) intel(0): EDID vendor "GWY", prod id 2186
(II) intel(0): Using EDID range info for horizontal sync
(II) intel(0): Using EDID range info for vertical refresh
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1680x1050"x0.0  146.37  1680 1784 1960 2240  1050 1056 1086 1089 +hsync +vsync (65.3 kHz)

The broken one also includes this error message:

(EE) intel(0): First SDVOC output reported failure to sync

but that only shows up after doing a VT switch.

** Attachment added: "lspci-vvnn.txt"
   http://launchpadlibrarian.net/24490757/lspci-vvnn.txt

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Xserver black screen on 3/28/09 update of Jaunty
https://bugs.launchpad.net/bugs/350399
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