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Message #10607
[Bug 1308105] Re: Xfce resets TV mode to NULL when power cycled
Note that there is a Ubuntu package of 4.12.1 available now
http://packages.ubuntu.com/zesty/xfce4-settings which can be installed
at least without dependency issues on Ubuntu 16.04.
The upstream commit that fixes the issue is here
https://git.xfce.org/xfce/xfce4-settings/commit/?id=2233f20a7ec6d7cb7dcc5752d62d98e37d9c21ad.
As mentioned in the upstream bug report: "[...] one issue in the patch;
when enabling the crtc it _unconditionally_ sets the output crtc
(preferred) mode, rotation etc. properties". Anyway it was decided to
merge the patch and address that issue in a new bug #. So maybe the best
way is to do the same here, i.e. mark this as fixed in zesty and apply
the patch in xenial and yakkety. And create a new bug for the lost
screen resolution and other settings.
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https://bugs.launchpad.net/bugs/1308105
Title:
Xfce resets TV mode to NULL when power cycled
Status in Mythbuntu:
Confirmed
Status in xfce4-settings:
Confirmed
Status in nvidia-graphics-drivers package in Ubuntu:
Invalid
Status in nvidia-graphics-drivers-331 package in Ubuntu:
Invalid
Status in xfce4-settings package in Ubuntu:
Confirmed
Bug description:
I had an HTPC with Mythbuntu 12.04 installed. Upon upgrading a new
behavior that if the TV is power cycled it no longer detects a link
with the HTPC.
When this happens I can find in the xorg log that there is an
accompanying log item:
[ 39829.509] (II) NVIDIA(0): Setting mode "NULL"
After debugging with NVIDIA at
https://devtalk.nvidia.com/default/topic/729955/linux/tv-stops-being-
detected/ we've deteremined it's a X client that reacts to the RANDR
events causing the mode to be set to NULL.
Working through the list in an Xfce environment, the culprit is
xfsettingsd. If xfsettingsd is running, it causes the TV to come up
in a NULL mode. If it's killed, it remains in the mode it was
previously running in.
Until this is fixed, this behavior can be worked around with a simple shell script:
==============================
#!/bin/sh
#Fix TV state when HDMI link is lost.
#By Mario Limonciello <superm1@xxxxxxxxxx>
OUTPUT="HDMI-0"
BAD_MODE="1280x720"
GOOD_MODE="1920x1080"
for MODE in $BAD_MODE $GOOD_MODE; do
DISPLAY=:0 xrandr --output $OUTPUT --mode $MODE
sleep 2
done
==============================
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