After some more sleuth work with NVIDIA, we've discovered that this is
happening because of a RANDR event. An X client is responding to the
RANDR events and forcing it to this NULL resolution.
I checked what clients were running, and it's xfsettingsd causing this
problem. If I kill xfsettingsd prior to turning on/off my TV it comes
back at the right resolution.
** Also affects: xfce4-settings (Ubuntu)
Importance: Undecided
Status: New
** Changed in: xfce4-settings (Ubuntu)
Status: New => Confirmed
** Changed in: nvidia-graphics-drivers (Ubuntu)
Status: Confirmed => Invalid
** Changed in: nvidia-graphics-drivers-331 (Ubuntu)
Status: Confirmed => Invalid
** Changed in: mythbuntu
Status: New => Confirmed
** Changed in: mythbuntu
Importance: Undecided => Medium
** Summary changed:
- HDMI Handshake fails after TV powered off
+ Xfce resets TV mode to NULL when power cycled
** Description changed:
- I had an HTPC with Mythbuntu 12.04 installed and all included NVIDIA 185
- driver package. Connected to the HTPC is an audio receiver and from the
- audio receiver a TV.
-
- I had no problems on NVIDIA 185.
-
- Since upgrading to 14.04 I have tried both the 304.117 driver as well as
- the 331.38 driver. Both have a new behavior that if the TV is power
- cycled it no longer detects a link.
+ 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"
- Upon recommendations from the internet i've captured the EDID, tried to
- hardcode the metamodes in the xorg conf, and regenerated the xorg conf
- using nvxconfig to no avail. The problem persists.
+ 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.
- Here is my original functional xorg.conf from 12.04 w/ NVIDIA 185:
- ==============================
- Section "Screen"
- Identifier "Default Screen"
- DefaultDepth 24
- EndSection
+ 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.
- Section "Device"
- Identifier "Default Device"
- Driver "nvidia"
- Option "DPI" "100x100"
- Option "NoLogo" "1"
- EndSection
- Section "Extensions"
- Option "Composite" "Disable"
- EndSection
- ==============================
-
- Here is the xorg conf I've cluttered all the workarounds on the internet that
still doesn't fix the problem:
- ==============================
- Section "Monitor"
- # HorizSync source: edid, VertRefresh source: edid
- Identifier "Monitor0"
- VendorName "Unknown"
- ModelName "SONY AVAMP"
- HorizSync 31.0 - 82.0
- VertRefresh 57.0 - 63.0
- Option "DPMS"
- EndSection
-
- Section "Device"
- Identifier "Device0"
- Driver "nvidia"
- VendorName "NVIDIA Corporation"
- BoardName "GeForce 9500 GT"
- Option "DPI" "100x100"
- Option "NoLogo" "1"
- Option "ConnectedMonitor" "DFP-1"
- Option "CustomEDID" "DFP-1:/etc/X11/edid.bin"
- Option "UseEDID" "True"
- EndSection
-
- Section "Screen"
- Identifier "Screen0"
- Device "Device0"
- Monitor "Monitor0"
- DefaultDepth 24
- Option "Stereo" "0"
- Option "metamodes" "1920x1080 +0+0"
- Option "SLI" "Off"
- Option "MultiGPU" "Off"
- Option "BaseMosaic" "off"
- SubSection "Display"
- Depth 24
- EndSubSection
- EndSection
-
- Section "Extensions"
- Option "Composite" "Disable"
- EndSection
- ==============================
-
- I have discovered that this behavior can be worked around with a simple shell
script:
+ 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
+ DISPLAY=:0 xrandr --output $OUTPUT --mode $MODE
+ sleep 2
done
==============================
--
You received this bug notification because you are a member of Ubuntu-X,
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/mythbuntu/+bug/1308105/+subscriptions
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