Xorg is unusably slow and flickery
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-video-intel (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: xserver-
After an update from Karmic to Lucid alpha3 Xorg became unusable.
I'm on an Acer 1810TZ with Intel 4500hd graphics.
Xorg is generally slow and uses 50-65% cpu on an average when it should idle. The screen flickers and I think that the wrong refreshrate is set somehow.
Xorg.0.log is being filled with the following lines a couple of times a second.
(II) intel(0): EDID vendor "AUO", prod id 8284
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1366x768"x0.0 65.50 1366 1390 1406 1406 768 770 774 776 -hsync -vsync (46.6 kHz)
This is spewed out by dmesg:
[ 4680.010670] Skipping EDID probe due to cached edid
[ 4680.180661] Skipping EDID probe due to cached edid
[ 4680.343652] Skipping EDID probe due to cached edid
[ 4680.513419] Skipping EDID probe due to cached edid
[ 4680.690676] Skipping EDID probe due to cached edid
[ 4680.861993] Skipping EDID probe due to cached edid
More info in the attachement
tags: | added: gloam |
This bug seems to be about some program that probes the monitor for the EDID information repeatedly. We have had several of those in the past, but usually it would be limited to once per 1-10 sec, which is bad enough. The challenge here is to find which program probes EDID. First, try gnome instead of KDE or the other way around. Then try failsafe login. Try to kill services, etc.