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from Xorg.0.log.old:
[ 10.484] (EE) Screen 0 deleted because of no matching config section.
[ 10.484] (II) UnloadModule: "vesa"
[ 10.484] (EE) Screen 0 deleted because of no matching config section.
[ 10.484] (II) UnloadModule: "modesetting"
[ 10.484]
Fatal server error:
[ 10.484] Cannot run in framebuffer mode. Please specify busIDs for
all framebuffer devices
[ 10.484]
[ 10.484] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 10.484] (EE) Please also check the log file at "/var/log/Xorg.0.log" for
additional information.
[ 10.484] (EE)
[ 10.485] Server terminated with error (1). Closing log file.
Machine: i5-2500K + Z68 chipset
Monitor: 42" TV, HDMI
The problem did not exist when using 12.04. When upgraded to 12.10,
sometimes (> 70%) during boot up it says "the system is running in low
graphics mode" and the login screen won't even show up.
The problem for 12.04 is that the screen resolution can only go up to
1366x768, but 12.10 can go with 1400x900 (however my TV actually support
1920x1080p.
I installed everything from the default ubuntu repositories, no
thirdparty graphics drivers installed. And I guess the Intel graphics
driver is already in the mainline kernel?
one more thing, if I goes to command line, and type "sudo service
lightdm restart", I can still enter the desktop, so the problem seems
not like a persistent one, more like some kind of timing issue (that's
probably why it is not happening every time).
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bot-comment quantal
--
low graphics mode
https://bugs.launchpad.net/bugs/1095203
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