Running Xubuntu 16.04.1 with all updates applied as of 31/01/17 this bug affected me when using the HDMI port of a Braswell chipset Shuttle XS36V5. When resuming my Samsung TV from standby the HDMI wouldn't wake up and thus no picture. It was the only display device attached. Tried various combinations of power management settings in UEFI/XFCE/TV to no avail, as well as a different HDMI port on TV as well as different HDMI.
Upon a 'sudo reboot' from SSH or by pressing the power button on the shuttle (had power button set to 'shutdown' instead of 'ask') the TV would wake up within a second or two and show the shutting down logo. Consulted your Freenode IRC channel, Flocculant suggested applying: https://launchpadlibrarian.net/269857837/xfce4-settings_4.12.0-3ubuntu1_amd64.deb Which i did with 'dpkg -i xfce4-settings_4.12.0-3ubuntu1_amd64.deb && apt-get install -f' and this fixed it. Petition to get this fix applied to a SRU for 16.04 thanks <3 -- You received this bug notification because you are a member of Mythbuntu Bug Team, which is subscribed to Mythbuntu. https://bugs.launchpad.net/bugs/1308105 Title: Xfce resets TV mode to NULL when power cycled Status in Mythbuntu: Confirmed Status in xfce4-settings: Fix Released 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/~mythbuntu-bugs Post to : mythbuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~mythbuntu-bugs More help : https://help.launchpad.net/ListHelp
