Monitor Doesn't Sleep or Wakes up periodically from sleep

[Guest]

Hi,

I have an annoying problem with my monitor either not going to sleep or when it does, it will periodically wake up from sleep then sometimes go back to sleep, repeating that it multiple times.

KDE Screen Locker (Screen Saver) = Start after 5 Min
KDE Screen Energy Saving = Switch off after 10 Min


How can this be resolved?

Hardware:

Asus X99-A MB
ASUS GeForce GTX 960 Strix OC
Philips PHL BDM4065 (DisplayPort) 4K @ 60 Hz

3.16.0-46-generic #62~14.04.1-Ubuntu SMP Tue Aug 11 16:27:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

KDELibs 4.13.3
Qt 4.8.6
nvidia driver 355.06



lsusb -t
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
|__ Port 6: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 3: Dev 3, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 4: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
|__ Port 5: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 5: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 6: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 10: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 3: Dev 5, If 0, Class=Hub, Driver=hub/4p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M


/sys/bus/usb/devices/*/power/wakeup



disabled
disabled
disabled
enabled
disabled
disabled
disabled
disabled
disabled
disabled
disabled
disabled
disabled


1-1/power/wakeup
2-1/power/wakeup
3-10.3/power/wakeup
3-10/power/wakeup
3-5/power/wakeup
3-6/power/wakeup
4-6.3/power/wakeup
4-6/power/wakeup
usb1/power/wakeup
usb2/power/wakeup
usb3/power/wakeup
usb4/power/wakeup
usb5/power/wakeup
usb6/power/wakeup

[NickStone]

It has probably something to do with ACPI not being set up correctly on your machine.

Take a look at the Ubuntu manpages about ACPI here -> http://manpages.ubuntu.com/manpages/....4freebsd.html

[oshunluvr]

I'm having the same issue here with 15.04 and three monitors hooked up. All are doing it. However, I also have two other computers attached to the same monitors so I wasn't sure if Kubuntu was to blame or not. Now I can start looking into it...

Post back if you learn anything new.

[oshunluvr]

...and for the record, this machine is 8 years old and has not had this issue with past versions of Kubuntu. BIOS settings haven't changed.

My thoughts were that some program I had running was waking up the monitors periodically. Up until last week or so, they wouldn't go to sleep at all. Even a manually forced sleep using xset didn't last more than a few seconds. Lately, they go to sleep, then once in a while I'd walk by the office and see that they were on.

I'll try and watch more closely and maybe I can catch a logged event causing the wake-up.

[Guest]

Nick,


You held back on sending me this, admit it - https://wiki.ubuntu.com/Kernel/Refer...ITricksAndTips


https://bugs.kde.org/show_bug.cgi?id=348082
https://userbase.kde.org/Power_Devil
http://blog.broulik.de/2015/02/power-management-in-5-3/


It doesn't look like acpi-support has changed since 2013:
http://changelogs.ubuntu.com/changel....142/changelog


Thanks for the link, I may have to dumpster dive into it. It appears trying to find out what caused a wake-up event is not a trivial task.


oshunluvr,




I am curious if kde notifications is causing this and / or:


1) a recent update applied
2) the wireless card I recently installed (just turned off Notifies about network events)
3) nvidia driver related




I'll post back updates.


Cheers,
Paul