I'm having a strange problem with an Ubuntu machine connected to an LGE flatscreen TV via RGB / VGA cable. I don't know if it's a screensaver or a power saver problem, but after 10 minutes on, the screen will black out and show a "no signal"-on-a-black-screen screensaver.
Then, when I switch the TV to another channel and back again to RGB input, the Ubuntu screen will come back, but will go black again after 10 minutes.
There is no input device connected to the Ubuntu machine (i.e. no mouse, keyboard).
I have Ubuntu configured to capture a screenshot every 15 minutes and have it uploaded to one of my web servers. According to the screenshots, everything is fine, but yet the screen is showing "no signal" on a black background.
ay_ac" is set to "0" (never)
I also had dpms disabled like so:
/usr/bin/xset -dpms -display :0
I'm now going to try and enable dpms but set all the timeouts to 0 like this:
/usr/bin/xset -display :0 dpms 0 0 0
I'm not sure if that will work though. Is there anything else I can try?
I'm sure it's not a problem with the TV itself because I had a different Ubuntu machine connected to it recently, and I didn't have this problem. I had to replace it because of a hardware fault.
Thanks for any help in advance!