You could probably just use 'xrandr --auto', at least that worked for me. I have actually now a different 'fix', by simply never having the system notice the hdmi-link goes down. I used this wiki-page to fix that for my Intel Haswell-cpu graphics.
https://wiki.archlinux.org/index.php/Kernel_mode_setting My final cmdline is now this: video=HDMI-A-1:1920x1080@60e dmr_kms_helper.edid_firmware=HDMI-A-1:edid/tv-edid-data.edid The tv-edid-data file is located in /usr/lib/firmware/edid/ and was derived via 'get-edid'. It actually also seemed to work with the built-in '1920x1080.edid' (saves you retrieving it from your receiver, but I thought it a bit more save to have the actual edid). Just supplying the video-parameter wasn't enough in my case, it failed to actually set the resolution to 1920x1080 (and used 1024x768 instead). Adding the edid-data fixed that (it may even be sufficient to only force-load the edid data). The reason this works is not because it fixes the issue, but because it prevents the hdmi-link from ever going down - as far as the kernel is concerned. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/1308105 Title: Xfce resets TV mode to NULL when power cycled Status in Mythbuntu, Ubuntu derivative focused upon MythTV: 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 <supe...@ubuntu.com> 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 ============================== To manage notifications about this bug go to: https://bugs.launchpad.net/mythbuntu/+bug/1308105/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp