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View Full Version : [ubuntu] HP Pavilion LCD goes black on battery



phidia
May 5th, 2008, 04:37 PM
I have mentioned this issue previously, but after doing some searching and reading through other threads I'm still lacking a solution.

I do have power management settings set to over 90% screen brightness and also have unselected dimming in both AC & battery settings.

I have looked in the bios several times-there are no settings there for LCD brightness.

My laptop-soon to be on ebay-is a Pavilion dv6707us with a nvidia 7150 gpu but this happens with both the nv and proprietary nvidia driver. Mostly I want to let people know this is an issue with this laptop.

When I unplug from AC power the LCD screen fades to black within approx 5 seconds (screen saver time, brightness & power management settings have no effect) Replugging the AC does not get the screen back, and the screen will remain black even on a reboot until I pull the battery.

Probably obvious but this behavior does not happen in windows (vista). I have used both gutsy and hardy plus several other distos on this laptop. I kind of think this is hardware issue that windows manages and linux is not aware of with some laptops.

I have read many threads here on this or similar problem-some posters apparently were able to fix their problem by unselecting "dim" in power management.

phidia
May 8th, 2008, 07:06 PM
OK I made this harder than it is. I had even read the solution to this but though I had the right parameters selected in power management.

the default in Preferences>screensaver>powermanagement is to dim the display completely when on battery. Not a good default!! See picture for explanation.
http://img9.imagevenue.com/loc1086/th_69892_pwrmanmess_122_1086lo.jpg (http://img9.imagevenue.com/img.php?image=69892_pwrmanmess_122_1086lo.jpg)

phidia
May 8th, 2008, 07:07 PM
OK I made this harder than it is. I had even read the solution to this but though I had the right parameters selected in power management.

the default in Preferences>screensaver>power management is to dim the display completely when on battery. Not a good default!! See picture for explanation.
http://img9.imagevenue.com/loc1086/th_69892_pwrmanmess_122_1086lo.jpg (http://img9.imagevenue.com/img.php?image=69892_pwrmanmess_122_1086lo.jpg)

Sorry for the double post-I don't know how that happened :(