linux-traipu team mailing list archive

[Drew Lustro <drewlustro@xxxxxxxxx>]

OK. This has been driving me nuts for weeks. I would lose my entire X
session every single day as soon as the screen blanked... quite
troublesome when you're trying to make linux work as your daily drive,
haha.

*Confirmed fix* w/ the patch suggested on xfce's bugzilla:
https://bugzilla.xfce.org/show_bug.cgi?id=11107#c53

Download the xfce4-settings source, apply the patch, increment with a
non-maintainer version number (for no future apt-get conflicts once this
gets an official fix), and reinstall your patched xfce4-settings.

I had to learn how to patch a .deb file properly in the process, but
that was worth it too.

-- Hardware/Software --
GPU: GTX 970 over DisplayPort 1.2
Monitor: Dell P2715 (4K@60Hz, hardware rev A03)
OS: Xubuntu Xenial (16.04 LTS)
Manually patched xfce4-settings version: 4.12.0-2ubuntu1

Useful links on patching .deb's:
https://help.ubuntu.com/community/UpdatingADeb
http://www.cyberciti.biz/faq/appy-patch-file-using-patch-command/

-- 
You received this bug notification because you are a member of UBUNTU -
AL - BR, 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:
  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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