Gard Spreeman, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
nouveau/+bug/1182051/comments/6 regarding this being fixed with an
update. For future reference you can manage the status of your own bugs
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** Changed in: xserver-xorg-video-nouveau (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1182051
Title:
Turning off eDP-1 causes stutter
Status in “xserver-xorg-video-nouveau” package in Ubuntu:
Invalid
Bug description:
After upgrading to Raring, my X stutters a lot whenever the eDP-1
output is disabled (for example with xrandr). In this state, the
kernel log is also filled with numerous messages regarding invalid
EDID checksums. The behavior was not seen with Quantal. The problem
also partially goes away with mainline kernel 3.9.
I would describe the stutters as about 10 ms freezes occurring roughly
every second. Meanwhile, dmesg sees a lot of
"[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 48" and a few "nouveau E[ I2C][0000:01:00.0]
AUXCH(1): tx req timeout 0x01114000". Behavior is restored to normal
when eDP-1 is re-enabled.
The problem was not seen in Quantal. Installing the 3.9 mainline
kernel partially mitigates the problem, but brings other ones, such as
a kworker thread pegged at 100% CPU. This could be unrelated.
The drm_kms_helper.poll=0 boot parameter does not help with the
standard Raring kernel, but is in fact neccessary with 3.9.
The problem seems to be unrelated to whether or not there are multiple
monitors attached, for example on DP-1 and VGA-1. A single monitor on
either DP-1 or VGA-1 is enough to observe the stutter as soon as eDP-1
is disabled.
(Simply leaving eDP-1 enabled is not an option for me, as it has to be
disabled to use DP-1 and VGA-1 simultaneously on my laptop.)
Ubuntu version: 13.04
xserver-xorg-video-nouveau version: 1:1.0.7-0ubuntu1
Kernel version: 3.8.0-21.32
Graphics hardware: 01:00.0 VGA compatible controller: NVIDIA Corporation
GT218M [NVS 3100M] (rev a2)
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