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davidm
Guru
Joined: 26 Apr 2009
Posts: 557
Location: US
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 Posted: Thu Dec 15, 2016 1:18 am Post subject: Monitor power saving (dpms) suddenly not working |
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Hello I recently switched from dvi to using hdmi and now the power saving feature for my lcd monitor is not working. This is doubly bad as the physical power button is also broke so it means right now I have to manually unplug it or else it stays on all the time.
What seems to be happening is that it works but then instantly turns right back on.
| Code: |
$ xset q
Keyboard Control:
auto repeat: on key click percent: 0 LED mask: 00000000
XKB indicators:
00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off
03: Compose: off 04: Kana: off 05: Sleep: off
06: Suspend: off 07: Mute: off 08: Misc: off
09: Mail: off 10: Charging: off 11: Shift Lock: off
12: Group 2: off 13: Mouse Keys: off
auto repeat delay: 600 repeat rate: 25
auto repeating keys: 00ffffffdffffbbf
fadfffefffedffff
9fffffffffffffff
fff7ffffffffffff
bell percent: 50 bell pitch: 400 bell duration: 100
Pointer Control:
acceleration: 35/10 threshold: 5
Screen Saver:
prefer blanking: yes allow exposures: yes
timeout: 0 cycle: 600
Colors:
default colormap: 0x20 BlackPixel: 0x0 WhitePixel: 0xffffff
Font Path:
/usr/share/fonts/misc/,/usr/share/fonts/100dpi/,/usr/share/fonts/75dpi/,built-ins
DPMS (Energy Star):
Standby: 600 Suspend: 900 Off: 1200
DPMS is Enabled
Monitor is On
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[Moderator edit: changed [quote] tags to [code] tags to preserve output layout. -Hu] |
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Hu
Moderator
Joined: 06 Mar 2007
Posts: 21635
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| Posted: Thu Dec 15, 2016 3:14 am Post subject: |
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| What desktop environment do you use? Does it matter if you close all X11 programs (other than the window manager) before blanking? I read recently a post where someone had a similar issue, but it only happened when certain programs were open. What program is normally responsible for placing your monitor into powersave mode? |
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davidm
Guru
Joined: 26 Apr 2009
Posts: 557
Location: US
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| Posted: Thu Dec 15, 2016 3:57 am Post subject: |
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I'm using KDE plasma 5.8.4 (~x64) with systemd and sddm. Even manually invoking "sleep 2; xset dpms force suspend" doesn't work. Well it begins blanking the screen but then instantly turns it back on. I can also see this happen each time when it is supposed to be automatically invoked. It acts like it is working and then suddenly doesn't and turns right back on. It happens over and over after the idle timeout threshold is reached where the monitor is supposed to suspend.
It seems to happen even before I open any programs manually but I will test some more and report back. Also I will try the dvi cable and verify that it still works to help narrow it down. |
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davidm
Guru
Joined: 26 Apr 2009
Posts: 557
Location: US
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| Posted: Wed Dec 21, 2016 12:53 pm Post subject: |
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Hmmm. I just switched backed to DVI and I can confirm it now works and suspends the lcd as it should. I'm probably going to just stay on DVI as there is no real reason not to at this point. However I'd like to help fix the bug (assuming it is one) and would be willing to switch back to hdmi for testing.
Does anyone have any suggestions on how to debug this and get meaningful logs related to this? |
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kharitonow
n00b
Joined: 10 Dec 2015
Posts: 38
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davidm
Guru
Joined: 26 Apr 2009
Posts: 557
Location: US
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| Posted: Wed Dec 21, 2016 5:36 pm Post subject: |
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My apologies, I should have stated that I am using nouveau:
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Linux gentoot3400 4.8.10-gentoo #2 SMP Thu Dec 8 18:56:48 EST 2016 x86_64 Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz GenuineIntel GNU/Linux
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[I] x11-drivers/xf86-video-nouveau
Available versions: 1.0.11{tbz2} 1.0.12 (~)1.0.13 {glamor}
Installed versions: 1.0.13(09:43:30 PM 10/22/2016)
Homepage: https://nouveau.freedesktop.org/
Description: Accelerated Open Source driver for nVidia cards
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01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 730] (rev a1) (prog-if 00 [VGA controller])
Subsystem: eVga.com. Corp. GF108 [GeForce GT 730]
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at fc000000 (32-bit, non-prefetchable) [size=16M]
Memory at f0000000 (64-bit, prefetchable) [size=128M]
Memory at f8000000 (64-bit, prefetchable) [size=32M]
I/O ports at dc80 [size=128]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Capabilities: [b4] Vendor Specific Information: Len=14 <?>
Capabilities: [100] Virtual Channel
Capabilities: [128] Power Budgeting <?>
Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
Kernel driver in use: nouveau
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I\ll try upgrading to kernel 4.9.0 and will see if by chance that fixes it. |
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Logicien
Veteran
Joined: 16 Sep 2005
Posts: 1555
Location: Montréal
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| Posted: Wed Dec 21, 2016 11:42 pm Post subject: |
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I found two ways to poweroff the screen by softwares. First
| Code: | | sleep 2 && xset dpms force off |
It look like the sleep command give to Xorg the idle time it need to trigger the off screen. A second method is to install vbetool and poweroff the screen using this tool who interact with the Bios. I had several problems with this method, the Usb wireless mouse and keyboard stop to respond, cannot switch vt with Ctrl+Alt+Fx and freezes.
| Code: | | sudo vbetool dpms off |
If you use vbetool, to put the screen on again, you have to execute the command
| Code: | | sudo vbetool dpms on |
without seing the screen or by using a shortcut. vbetool need root previleges to work. All of this have been tested on an Hdmi screen port with xf86-video-nouveau. vbetool work correctly with xf86-video-intel like xset.
_________________
Paul |
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