So I watched it more closely now, and I think you are right: the KMS
race might well be a red herring. Sometimes I do see the big text
console appear with the 25 "ureadahead-other terminated with status 4"
messages before gdm/X start up, so KMS was ready at that time. I suppose
the broken text terminals ("frequency not supported") are due to the
vesa driver then?
When such a failure occurs, I don't have a /var/log/Xorg.0.log, just a
(rather uninteresting) Xorg.failsafe.log with VESA stuff. dmesg has no
errors either and just shows that DRM is up and the screen modes are set
properly.
/var/log/gdm/:0.log shows that KMS/DRM indeed worked:
[ 3.243116] (II) intel(0): Output DVI1 using initial mode 1280x1024
[ 3.292017] (II) intel(0): [DRI2] Setup complete
[ 3.292039] (**) intel(0): Kernel mode setting active, disabling FBC.
There is no error message in the end, just
[ 36.783732] (II) intel(0): Modeline "1280x1024"x0.0 108.00 1280 1328 1440
1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
[ 119.962615] (II) "Video Bus": Close
[ 120.012305] (II) "Video Bus": Close
[ 120.052313] (II) "Power Button": Close
[ 120.082316] (II) "Sleep Button": Close
[ 120.132396] (II) "HID 05f3:0007": Close
[ 120.192504] (II) "HID 05f3:0007": Close
[ 120.262437] (II) "Logitech USB-PS/2 Optical Mouse": Close
[ 120.312431] (II) "AT Translated Set 2 keyboard": Close
[ 120.372361] (II) "DualPoint Stick": Close
[ 120.522372] (II) "Dell WMI hotkeys": Close
[ 120.572430] (II) "Macintosh mouse button emulation": Close
ddxSigGiveUp: Closing log
Given the timestamps that's a normal shutdown; I played a bit with the
failsafe options, so two minutes sounds realistic. What I wonder about
is why the server with the intel driver has been up for so long, because
what I saw and used was definitively the VESA driver.
Nothing else interesting in :0-{slave,greeter}.log unfortunately. I'll
try an strace and some more debugging.
** Changed in: gdm (Ubuntu)
Status: New => Incomplete
** Summary changed:
- gdm starts too early, races with KMS, X.org/VTs fail
+ gdm starts too early, X.org/VTs fail
--
gdm starts too early, X.org/VTs fail
https://bugs.launchpad.net/bugs/502838
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