Screen output stays blank if screen turned off and on again Mythbuntu
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I have a Sony Bravia KDL-40CX520 TV connected to my Mythbuntu box (Ubuntu 16.04.6 LTS) via HDMI. The TV is detected and shows up correctly under Settings-> Display. The box is running an AMD-A4 APU, with open source radeon driver. There is no other graphics card installed.
If the TV is turned on while MythTV is already running, or the TV is turned off and then on again, result is just a blank screen with no video/audio. The only way to restore the display would be to reboot the system while the TV remains on.
I can remote in via ssh and run xrandr. The only difference I see when there is no signal is that the (*) asterisk indicating the current mode disappears:
mythtvuser@mythtv-1:~$ xrandr -display :0.0
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 886mm x 498mm
1920x1080 60.00*+ 50.00 59.94 30.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 30.00 59.94 29.97 24.00 23.98
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
Running:
xrandr --auto
or via ssh:
xrandr --auto -display :0.0
will reset things back to working order.
I'm wondering why the current mode changes to nothing (!) when the TV turns off and what can be done to always force the display setting to stay at 1920x1080?
I thought xorg.conf might work but there is no such file in /etc/X11/ and I'm having the same issue creating it ("no devices to configure. Configuration failed") as detailed in
Turn off vsync (Radeon) and create xorg.conf
So right now, I could implement a workaround, but I'm interested in a fix to the problem itself.
One thing that I have noticed, is the issue only occurs when in graphics mode. If I switch to tty (Ctrl + Alt + 1), I'm able to turn the TV off and on without losing the signal.
I suspect the problem is X related, or there is some desktop configuration option, but not really sure what to do from here. Any advice is appreciated.
xfce hdmi mythbuntu
asked Apr 7 at 5:37
SylvesterSylvester
12
add a comment |
I have a Sony Bravia KDL-40CX520 TV connected to my Mythbuntu box (Ubuntu 16.04.6 LTS) via HDMI. The TV is detected and shows up correctly under Settings-> Display. The box is running an AMD-A4 APU, with open source radeon driver. There is no other graphics card installed.
If the TV is turned on while MythTV is already running, or the TV is turned off and then on again, result is just a blank screen with no video/audio. The only way to restore the display would be to reboot the system while the TV remains on.
I can remote in via ssh and run xrandr. The only difference I see when there is no signal is that the (*) asterisk indicating the current mode disappears:
mythtvuser@mythtv-1:~$ xrandr -display :0.0
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 886mm x 498mm
1920x1080 60.00*+ 50.00 59.94 30.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 30.00 59.94 29.97 24.00 23.98
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
Running:
xrandr --auto
or via ssh:
xrandr --auto -display :0.0
will reset things back to working order.
I'm wondering why the current mode changes to nothing (!) when the TV turns off and what can be done to always force the display setting to stay at 1920x1080?
I thought xorg.conf might work but there is no such file in /etc/X11/ and I'm having the same issue creating it ("no devices to configure. Configuration failed") as detailed in
Turn off vsync (Radeon) and create xorg.conf
So right now, I could implement a workaround, but I'm interested in a fix to the problem itself.
One thing that I have noticed, is the issue only occurs when in graphics mode. If I switch to tty (Ctrl + Alt + 1), I'm able to turn the TV off and on without losing the signal.
I suspect the problem is X related, or there is some desktop configuration option, but not really sure what to do from here. Any advice is appreciated.
xfce hdmi mythbuntu
asked Apr 7 at 5:37
SylvesterSylvester
12
add a comment |
I have a Sony Bravia KDL-40CX520 TV connected to my Mythbuntu box (Ubuntu 16.04.6 LTS) via HDMI. The TV is detected and shows up correctly under Settings-> Display. The box is running an AMD-A4 APU, with open source radeon driver. There is no other graphics card installed.
If the TV is turned on while MythTV is already running, or the TV is turned off and then on again, result is just a blank screen with no video/audio. The only way to restore the display would be to reboot the system while the TV remains on.
I can remote in via ssh and run xrandr. The only difference I see when there is no signal is that the (*) asterisk indicating the current mode disappears:
mythtvuser@mythtv-1:~$ xrandr -display :0.0
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 886mm x 498mm
1920x1080 60.00*+ 50.00 59.94 30.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 30.00 59.94 29.97 24.00 23.98
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
Running:
xrandr --auto
or via ssh:
xrandr --auto -display :0.0
will reset things back to working order.
I'm wondering why the current mode changes to nothing (!) when the TV turns off and what can be done to always force the display setting to stay at 1920x1080?
I thought xorg.conf might work but there is no such file in /etc/X11/ and I'm having the same issue creating it ("no devices to configure. Configuration failed") as detailed in
Turn off vsync (Radeon) and create xorg.conf
So right now, I could implement a workaround, but I'm interested in a fix to the problem itself.
One thing that I have noticed, is the issue only occurs when in graphics mode. If I switch to tty (Ctrl + Alt + 1), I'm able to turn the TV off and on without losing the signal.
I suspect the problem is X related, or there is some desktop configuration option, but not really sure what to do from here. Any advice is appreciated.
xfce hdmi mythbuntu
asked Apr 7 at 5:37
SylvesterSylvester
12
I have a Sony Bravia KDL-40CX520 TV connected to my Mythbuntu box (Ubuntu 16.04.6 LTS) via HDMI. The TV is detected and shows up correctly under Settings-> Display. The box is running an AMD-A4 APU, with open source radeon driver. There is no other graphics card installed.
If the TV is turned on while MythTV is already running, or the TV is turned off and then on again, result is just a blank screen with no video/audio. The only way to restore the display would be to reboot the system while the TV remains on.
I can remote in via ssh and run xrandr. The only difference I see when there is no signal is that the (*) asterisk indicating the current mode disappears:
mythtvuser@mythtv-1:~$ xrandr -display :0.0
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 886mm x 498mm
1920x1080 60.00*+ 50.00 59.94 30.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 30.00 59.94 29.97 24.00 23.98
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
Running:
xrandr --auto
or via ssh:
xrandr --auto -display :0.0
will reset things back to working order.
I'm wondering why the current mode changes to nothing (!) when the TV turns off and what can be done to always force the display setting to stay at 1920x1080?
I thought xorg.conf might work but there is no such file in /etc/X11/ and I'm having the same issue creating it ("no devices to configure. Configuration failed") as detailed in
Turn off vsync (Radeon) and create xorg.conf
So right now, I could implement a workaround, but I'm interested in a fix to the problem itself.
One thing that I have noticed, is the issue only occurs when in graphics mode. If I switch to tty (Ctrl + Alt + 1), I'm able to turn the TV off and on without losing the signal.
I suspect the problem is X related, or there is some desktop configuration option, but not really sure what to do from here. Any advice is appreciated.
xfce hdmi mythbuntu
xfce hdmi mythbuntu
asked Apr 7 at 5:37
SylvesterSylvester
12
asked Apr 7 at 5:37
SylvesterSylvester
12
asked Apr 7 at 5:37
SylvesterSylvester
12
asked Apr 7 at 5:37
SylvesterSylvester
12
asked Apr 7 at 5:37
SylvesterSylvester
12
12
add a comment |
add a comment |
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