I have an emachines E525 laptop and I have been experiencing problems with my screen backlight since I installed Natty. I have installed the patched kamal mostafa kernel and my problem symtoms now are: 1) no backlight at startup but fixable with the hotkeys 2) the inverted hotkeys. 3) the comptuter cannot be controlled when I return from suspension, showing me a black (but with brightness active) screen with the mouse pointer swimming in it aimlessly or showing nothin at all, making me to press and hold the power button down to restart the computer. Rarely, though, it works fine. But realy rarely. This is not the case with hibernation, however, which works fine. AND 3)when I use the laptop battery to turn my computer on the backlight is off during the "Ubuntu" starting/welcoming screen as always but just before that screen switches to my desktop screen the backlight is on and I can see the starting screen (only briefly) and then my desktop screen. However, this is NOT happening when the laptop is on main power source whether it is only main or I recharge the battery. This is happening only on battery alone. Also when I press the brightness hotkey it shows me that the brighness bar is halfway full. Now, when I use the i915.alse_backlight=1 parameter on GRUB the following happen: 1) I have full brightness from the beginning, no problems at all with that. 2) the hotkeys for brightness don't work. 3) the return from suspension still messes up my computer....hibernation works fine. 4) whether the power source is main or battery or both it does't make any difference. 5) the screen is somewhat messed up meaning that it's annoyingly wide.
On all cases, closing the lid makes no problems because I have changed the option so the computer does nothing when I close the lid. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568611 Title: Screen brightness control fails on Dell Studio 1558 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
