<div class="gmail_quote">On Dec 21, 2007 8:59 AM, Phil Dibowitz <<a href="mailto:phil@ipom.com" target="_blank">phil@ipom.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>Holger Macht wrote: > On Thu 20. Dec - 18:16:42, Phil Dibowitz wrote: >> (re-send, my first one didn't go through, as I wasn't subscribed) >> >> I have a Dell Latitude C400 and whenever my laptop suspends, my screen never >> powers back on. </div></blockquote><div> I don't know if this is your issue or not, but it is mine... I have a Dell Inspiron 6400/1505, and when coming out of suspend my 'screen never powers back on' either. Well thats not exactly true. The real symptoms (when I examine the system _very_ closely under a lot of conditions) are two fold: 1/ does the backlight turn back on, 2/ Is the screen re-painted with something. I find that my backlight does turn back on, but my screen is rarely re-painted, so it 'seems' as though my screen never powers back on. I did my tests in a dark room, so I could see the back light leaking through a black screen, and when it comes out of suspend, I see its dim flicker behind that black screen. So now my issue is how do I get the screen refreshed? In my case I disable the screen inactivity lock, so when the laptop un-suspends, there is nothing running that detects the unsuspend to cause _anything_ to change on the display. The only way I can get the X display to repaint is to flip to a text screen and flip back to the X server (ie. Ctl-Alt-F1 and then Alt-F7) When I did have the screen lock turned on, it seems that the screen lock program received a signal (just as if it was a key press or mouse-move) that caused X to un blank and paint the password prompt dialog box. And that was good enough to re-paint the screen. So in my case... coming out of suspend, I wish there was a notification to X (at the appropriate time) to tell it to re-paint the screen. </div> </div>