[SOLVED] HDMI Connection - LG TV loosing signal when turned off

glicious · 2016-05-22 03:42:30

Hi,

This is an awkward problem and I was wondering if any of you have come across a similar situation and managed to resolve it?

I have a new LG TV connected to my Arch PC via HDMI. Every time I turn off my TV, the back on, my HDMI signal will be lost.

All I'll see is a blank screen with message on TV "No signal detected. Please check the input connection...".

So then, I'll have to:

1. SSH into PC from another.
2. Type "pkill x".
3. Go back to PC's keyboard and BLINDLY type "startxfce".

"Magically" I am in XFCE.

BTW, I have tested 3 different cables, and all 3 different HDMI ports on TV.

Testing on other monitors and other TV proved to have no issues.

So, I am a little bit confused as to what to do next.

The following are some configurations that might assist:

$ lspci -k | grep -A 2 -E "(VGA|3D)"
08:00.0 VGA compatible controller: NVIDIA Corporation GM204M [GeForce GTX 970M] (rev a1)
	Subsystem: ZOTAC International (MCO) Ltd. Device b282
	Kernel driver in use: nvidia

$ uname -a
Linux hema 4.5.3-1-ARCH #1 SMP PREEMPT Sat May 7 20:43:57 CEST 2016 x86_64 GNU/Linux

Also, I have customised the xorg.conf:

$ cat /etc/X11/xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 364.19  (builduser@felix)  Sat Apr 23 14:31:57 UTC 2016

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG Electronics LG TV"
    HorizSync       30.0 - 136.0
    VertRefresh     58.0 - 62.0
    # Option         "DPMS"
    Option         "ExactModeTimingsDVI"            "true"
    Option         "DPI" "96 x 96"
    Option         "DPMS"                           "false"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 960"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-2"
    Option         "metamodes" "nvidia-auto-select +0+0; nvidia-auto-select +0+0 {viewportout=1920x1200+0+0}"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Thank you.

Last edited by glicious (2016-06-11 03:55:19)

WFV · 2016-05-22 19:24:47

It may be xfce4-settings. Install the patched version from the AUR "xfce4-settings-blank-screen-fix" or patch your current xfce4-settings package yourself. If you install the one from the AUR it will prompt you to remove xfce4-settings (conflict), answer = yes. This has been a problem with xfce4-settings since 4.12 versions.

glicious · 2016-05-23 03:58:11

WFV wrote:

It may be xfce4-settings. Install the patched version from the AUR "xfce4-settings-blank-screen-fix" or patch your current xfce4-settings package yourself. If you install the one from the AUR it will prompt you to remove xfce4-settings (conflict), answer = yes. This has been a problem with xfce4-settings since 4.12 versions.

Thank you!

I did this and it looks like I am able to go back to XFCE if I did a TV turn off/on.

However, if I were to restart my Arch PC, screen goes blank. I have to plug another monitor, login, unplug from monitor, plug into TV, and blindly type startxfce.

For some reason, my TV doesn't like terminal login screen and is expecting X at boot.

Last edited by glicious (2016-05-23 22:51:52)

WFV · 2016-05-23 22:09:44

can't help you there, mine is set to startx when it boots up so have never tested the patch by what you describe + not connected to a TV monitor, just a regular desktop led/lcd.

glicious · 2016-05-23 22:54:47

I guess,I'll have to do the same and hope that I don't need to do this monitor swapping every time I reboot Arch PC.

WFV · 2016-05-24 01:52:49

If the problem is only in xfce, then it sounds similiar to this, which leads to: https://bugzilla.xfce.org/show_bug.cgi?id=11107.
You may want to perform step 2 to 7 from the first link, if only to rule out the possibility.

glicious · 2016-05-24 02:01:21

If it's an XFCE issue, I may have to try another Desktop Environment. My Arch PC is my dev server, and I also use it as my HTPC and don't want a bloated Gnome or KDE to take up resources.

Last edited by glicious (2016-05-24 05:35:21)

WFV · 2016-05-24 18:15:05

You installed the patched xfce4-settings and it works with other monitors except the LG TV if the Arch pc is rebooted while the TV remains on?
I'm not using an xorg.conf file but looks like that is for loading your nvidia drivers? I have a Radeon module loaded in the boot.
Maybe try lxde instead of xfce? I'd keep trying before resorting to gnome.

glicious · 2016-06-11 03:52:50

I managed to partially resolve this, by installing LightDM. The box starts up with a blank screen (TV says no display), a few seconds later, I get to the login view of this Display Manager. If I want to do something on BIOS, or have a regular black screen terminal emulator, I have to use my old TV, or another monitor.

5ulo · 2016-08-08 21:35:26

Okay.. so here's almost the same problem but this time with Gnome. My HTPC/server on Arch is running 24/7.. when I restart the computer over ssh with TV turned off, it boots normally (all services are working), but after switching on the TV there's no signal at all. So I have to restart the computer again with tv turned on.
Gnome-shell, latest updates..

glicious · 2016-08-09 02:02:26

Yes, this is still an issue for me. I have contacted LG, but you can only imagine their concern (the lack thereof), for an issue, that doesn't directly link to the use of their product, under normal circumstances.

Are you able to see your HTPC's BIOS when your PC boots up?

glicious · 2016-12-06 03:47:40

So, this is what I do every time I restart my HTPC. Turn off TV, restart HTPC (via SSH), turn on TV, SSH into HTPC and and restart lighdm.

ahantsch · 2017-03-09 14:32:04

I had same problem. My system is an Asrock BeeBox 3150 based on Intel NUC. TV connected via HDMI cable. I resolved it adding this line to /etc/X11/mhwd.d/intel.conf (on Section "Device")

Option "HotPlug" "false"

I got this info from intel driver manpage (man intel).

Cheers.

5ulo · 2017-03-09 21:00:48

Nope.. Hotplug isn't working for me. This is my /etc/X11/xorg.conf.d/20-intel.conf for my N3150 based HTPC:

Section "Device"
   Identifier   "Intel Graphics"
   Driver       "intel"
   Option       "TearFree"      "true"
   #Option      "AccelMethod"   "uxa"
   #Option      "AccelMethod"   "sna"
   Option       "AccelMethod"   "glamor"
   Option       "DRI"           "3"
   Option       "Hotplug"       "false"
EndSection

Tried "Hotplug" and "HotPlug"
I tried to setup /boot/loader/entries/arch.conf. Tried all these options

#options root=PARTUUID=474558ec-48d2-4c07-a077-888a19f0d103 rw video=HDMI-A-1:1920x1080@60D
options root=PARTUUID=474558ec-48d2-4c07-a077-888a19f0d103 rw video=HDMI-A-1
#options root=PARTUUID=474558ec-48d2-4c07-a077-888a19f0d103 rw video=DP-2:d
#options root=PARTUUID=474558ec-48d2-4c07-a077-888a19f0d103 rw video=DP-2:d i915 modeset=1 enable_execlists=0

The commented

options root=PARTUUID=474558ec-48d2-4c07-a077-888a19f0d103 rw video=HDMI-A-1:1920x1080@60D

will send the signal through HDMI always but it's still 1024x768 no matter what resolution is set. This works also without the "HotPlug" option.

Arch Linux

#1 2016-05-22 03:42:30

[SOLVED] HDMI Connection - LG TV loosing signal when turned off

#2 2016-05-22 19:24:47

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#3 2016-05-23 03:58:11

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#4 2016-05-23 22:09:44

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#5 2016-05-23 22:54:47

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#6 2016-05-24 01:52:49

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#7 2016-05-24 02:01:21

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#8 2016-05-24 18:15:05

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#9 2016-06-11 03:52:50

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#10 2016-08-08 21:35:26

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#11 2016-08-09 02:02:26

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#12 2016-12-06 03:47:40

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#13 2017-03-09 14:32:04

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

#14 2017-03-09 21:00:48

Re: [SOLVED] HDMI Connection - LG TV loosing signal when turned off

Board footer