Arch Linux

vuokkosetae

Member

Registered: 2009-03-12

Posts: 21

Displayport, 4k and Nvidia doesn't wake up.

I have dual head system. FullHD display connected with HDMI works always, but 4k display Samsung U24E590 doesn't wake up from stand by 9 of 10 times. I have GeForce GTX960 driving the displays. I'm using Nvidia binary drivers.

dmesg, /var/log/X.org.0.log doesn't have any lines covering that display problem.

xset dpms force off or on doesn't help either if that display is in stand by. When display is on, xset dpms force off blanks it, but it doesn't enter stand by mode and it wakes nicely up.

When in stand by xrandr shows identical outputs to on state of xrandr output. So my system doesn't see any problems.

However I know how to get the display on. I can use xrandr to switch off the display and then bring it on. Then it wakes from stand by. Problem is lxpanel segfaults.

Where to look more, gather information and file a bug report? Or maybe fix this issue?

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,734

Website

Re: Displayport, 4k and Nvidia doesn't wake up.

Experienced similar problems with DP.  Solution was to use HDMI.  Maybe not possible for you.

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Chazza

Wiki Maintainer

Registered: 2013-06-02

Posts: 506

Re: Displayport, 4k and Nvidia doesn't wake up.

xset dpms force off or on doesn't help either if that display is in stand by. When display is on, xset dpms force off blanks it, but it doesn't enter stand by mode and it wakes nicely up.

The wiki recommends using:

sleep 1; xset dpms force off

Last edited by Chazza (2015-09-19 13:25:03)

vuokkosetae

Member

Registered: 2009-03-12

Posts: 21

Re: Displayport, 4k and Nvidia doesn't wake up.

Experienced similar problems with DP.  Solution was to use HDMI.  Maybe not possible for you.

My FullHD display doesn't have working DVI and graphics card doesn't have more than one HDMI. Other solution would use VGA but I believe 1920x1200 doesn't fit there.