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Old 05-04-2009, 10:04 AM   #1
Registered: Dec 2008
Distribution: Ubuntu 8.10
Posts: 35

Rep: Reputation: 15
Angry Dual Monitors won't SLEEP in TwinView mode

I've had this issue since Hardy (8.04), and each upgrade (intrepid and now jaunty) I've been crossing my fingers and hoping for a fix but it has not come

Description: I have a dual-monitor setup and ever since I switched over from "Separate X-Sessions" to "TwinView" the monitors won't go into sleep mode.
My video card is: nVIDIA GeForce 8600GT and I am using the restricted drivers v180.44
Both monitors are hooked up to that videocard.
Also should be noted I am using 64bit version of Ubuntu Desktop, of which I just upgraded to Jaunty.

Any assistance in helping to diagnose this issue would be GREATLY appreciated.


p.s. "xset dpms force off" doesn't work either

See also:
Old 05-04-2009, 11:11 AM   #2
Registered: Dec 2008
Distribution: Ubuntu 8.10
Posts: 35

Original Poster
Rep: Reputation: 15
After some googling I found this page:
According to this page "vbetool" seems to be the solution.

Quick description of vbetool: "vbetool uses lrmi in order to run code from the video BIOS. Currently, it is able to alter DPMS states, save/restore video card state, and attempt to initialize the video card from scratch. It exists primarily in order to increase the chances of successfully recovering video state after an ACPI S3 suspend."

So I tried what it said and used: sudo vbetool dpms off
And it Worked :-D !!!
Wait a minute not so fast...
I can't break out of it :-(
The monitors are stuck in standby mode... I tried moving the mouse, slamming my keyboard against my head, ctrl+alt+del... nothing seems to break it out of standby mode. It seems that the GPU's BIOS is stuck in Standby Mode... I had to manually press the reset button on the box to get it to restart.

Hmm, off to do some more research.
Any idea's out there?

I think I might know why I can't get out of standby mode, or at least I have a guess.
When I try to run vbetool as user I get the following error messages:
open /dev/mem: Permission denied
Failed to initialise LRMI (Linux Real-Mode Interface).
So in order to initiate vbetool I need to use sudo. So my assumption is that because I am running vbetool as sudo/root I can't get out of it by moving the mouse or keyboard because these are actions that are being performed as the user.
Maybe I am way off here, but it's just a guess. Any idea's on how to run vbetool as user to test?

Last edited by BassKozz; 05-04-2009 at 11:28 AM. Reason: Update


display, dpms, dual, gnome, gnome power manager, management, nvidia, power, twinview

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