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My external monitor turning off every 10-13 seconds Ubuntu 16.04 (did that in 14.04 too). Very annoying. Server is a little old, a DELL PE2850, Intel chipset.

I ran: lspci | grep VGA to get the below:

VGA compatible controller Advanced Micro Devices, Inc. [AMD/ATI] RV100 [Radeon 7000/Radeon VE] VGA controller

I also tried the intel-microcode (proprietary) for the controller option, but same result:

Settings > Software & Updates > Additional Drivers >

Using Processor microcode firmware for Intel CPUs from intel-microcode (proprietary)

Tried this post command remedy, with a reboot, but no workie: "Ubuntu 16.04 LTS 64bit - screen goes black every 15 seconds" ubuntu 16.04 LTS 64bit - screen goes black every 15 seconds

xset -dpms

I've checked cabling also. Any help appreciated.

Thanks,

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  • Have you tried a different monitor? What brand is it? Does it have an auto sleep mode? Just want to make sure it's the software and not the hardware first.
    – WinEunuuchs2Unix
    Oct 11, 2016 at 23:34
  • Yes, I am using a ViewSonic now 23", but had the same problem with an older Dell 19". We can't rule that necessarily, but I think it's unlikely having used two monitors. I don't have another one to try at the moment.
    – comicrebel
    Oct 11, 2016 at 23:49
  • New observation: The 10-13 second blink (screen goes completely black for one second) does not occur at the login shell, only after I log into my account.
    – comicrebel
    Oct 11, 2016 at 23:57
  • Does it turn off in 12 seconds whilst continuing typing / mouse movement? After it goes dark does moving mouse or pressing a key turn it back on?
    – WinEunuuchs2Unix
    Oct 12, 2016 at 0:15
  • I can still type and move mouse with normal I/O function, ie: drag/resize window, enter text and {Enter} and OS responds. Just the monitor signal turns off for 2 seconds, then back on for 10 seconds, I have now times both on and off sequences.
    – comicrebel
    Oct 12, 2016 at 1:14

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