Screensaver "Blank Screen" should use DPMS

Bug #257358 reported by Ryan Thompson on 2008-08-12
68
This bug affects 11 people
Affects Status Importance Assigned to Milestone
GNOME Screensaver
In Progress
Medium
gnome-screensaver (Ubuntu)
Low
Unassigned
Nominated for Hardy by DaveAbrahams
Nominated for Intrepid by lopthopman
Nominated for Jaunty by DaveAbrahams

Bug Description

Binary package hint: gnome-screensaver

When "Blank Screen" is selected as the screensaver, the screen should actually turn off using DPMS when the screen saver activates, at least for LCD monitors. This would help laptops, since merely displaying a blank screen doesn't actually save power on an LCD.

Changed in gnome-screensaver:
status: Unknown → New
Changed in gnome-screensaver:
importance: Undecided → Low
status: New → Triaged

I agree. Screen should sleep, instead of just displaying black.

Martin Pool (mbp) wrote :

It would be nice if it could use just the lowest level of DPMS saving, so that the screen comes back quickly, and then use a deeper sleep when it reaches the "put display to sleep" level.

Martin Pool (mbp) wrote :

Note that you can use the 'power management' button to put the display to real sleep, aside from bug 203513

Ryan Thompson (rct86) wrote :

I agree that using DPMS to blank the screen should not be the default on CRT monitors, just on LCDs. Doesn't xrandr provide info on each available monitor? I think the appropriate behavior would be to use DPMS to blank any screen that can be positively identified as a flatscreen.

2009/6/10 Darwin Award Winner <email address hidden>:
> I agree that using DPMS to blank the screen should not be the default on
> CRT monitors, just on LCDs.

That wasn't what I said though. :-)

I think that on all screens, 'just blank' should mean 'dpms standby'.

According to http://en.wikipedia.org/wiki/VESA_Display_Power_Management_Signaling
any monitor should be able to recover from that state in 1s.

I don't see any reason not to use it on CRTs, when I had one it worked
as DPMS says.

--
Martin <http://launchpad.net/~mbp/>

Changed in gnome-screensaver:
importance: Unknown → Medium
Changed in gnome-screensaver:
status: New → In Progress
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