Ubuntu

Screen won't turn on after monitor was briefly turned off

Asked by Wiktor: Nizio

When I turn the monitor off, even for a moment, I cannot turn the screen on again. The monitor claims that there is no signal. I know the system has not hanged up, as music is still playing.

I have 34" Dell Ultra Sharp U3415W running over Display Port at 3440x1440, 60 Hz.

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Wiktor: Nizio
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This question was originally filed as bug #1650789.

Revision history for this message
Brian Murray (brian-murray) said : 		#1

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We appreciate the difficulties you are facing, but it would make more sense to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs#When%20not%20to%20file%20a%20bug.

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#2

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a

Thanks

Revision history for this message
Wiktor: Nizio (zap-4) said : 		#3

This is what I've got from running the command on 16.10 Live USB (The problem is still reproducible in Live USB mode):

  *-display
       description: VGA compatible controller
       product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:32 memory:f7800000-f7bfffff memory:e0000000-efffffff ioport:f000(size=64) memory:c0000-dffff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety
Linux ubuntu 4.8.0-22-generic #24-Ubuntu SMP Sat Oct 8 09:15:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Revision history for this message
Wiktor: Nizio (zap-4) said : 		#4

I fixed it by disabling DP 1.2 in my monitor settings.

Go to "Display" in Monitor's OSD, then "DP 1.2" and select "Disable".