[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
i still have this problem on my Sony VPCF12M1E , actually i have it on some linux distributions , fedora ubuntu suse debian (all current releases, havent tried the others). About ubuntu i tried both 10.04lts and 10.10. The situation is that the screen either works at full brightness or doesnt work at all, because when decreasing it, the screen becomes black. This is what happens both when i manually decrease the screen brightness from 100% level AND when the power management program decreases brightness due to user inactivity or because of power manag. profile switching (for example when you unplug the acadapter) this's a big problem for laptops, i hope it gets fixed. thanks, goodbye. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. https://bugs.launchpad.net/bugs/121833 Title: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
@Ryan, is this fix still the cause of a regression for you? Does the regression still remain in the upcoming Jaunty 9.04 release - http://cdimage.ubuntu.com/daily-live/current/ . Please let us know. Thanks. ** Changed in: linux (Ubuntu) Status: Fix Committed = Fix Released ** Changed in: linux (Ubuntu) Assignee: Ben Collins (ben-collins) = (unassigned) -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
Re: [Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
This seems to be resolved. I've upgraded to 9.04 on both my laptops and I haven't had backlight issues since. On 4/21/2009 2:15 PM, Leann Ogasawara wrote: @Ryan, is this fix still the cause of a regression for you? Does the regression still remain in the upcoming Jaunty 9.04 release - http://cdimage.ubuntu.com/daily-live/current/ . Please let us know. Thanks. ** Changed in: linux (Ubuntu) Status: Fix Committed = Fix Released ** Changed in: linux (Ubuntu) Assignee: Ben Collins (ben-collins) = (unassigned) -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
not a gpm bug. ** Changed in: gnome-power-manager (Ubuntu) Status: New = Invalid -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
I thought of a different way to re-add zero: simply allow it as one of the usable values. As it is right now, gnome-power-manager's indicated brightness levels (100, 85, 71, 57, 42, 28, 14, 0) no longer match the indicated values in the dsdt: (100, 87, 75, 62, 50, 37, 25, 12, and a true zero you could add.) In addition, some time try out guidance-power-manager, and you'll notice that its backlight control is far more sane -- it actually remembers the levels you set for each power state. -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
Thank you! I'm glad to see that the 2.6.24-11-generic kernel I recently installed has fixed this! One slightly odd request: sometimes, for a gimmick, it's fun to turn off the backlight deliberately; is there any way to do this now, perhaps by echoing a specific negative value into sysfs manually? I'd think it'd require some alteration to the patch. -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
This was working fine for me on my ThinkPad X61T laptop until the latest Kernel this worked fine. With the latest kernel (24-11) my laptop display now properly displays after resuming from suspend, but now I cannot control the brightness through the Gnome applet or the function keys on my keyboard. The keys (via OSD) and slider work and show that the brightness is being changed, but it doesn't actually change the brightness of the screen. -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
Thanks Dana. I'm including the corresponding upstream git commit id's for the kernel team to reference. Thanks. commit 38531e6fe51ad5c7dfe72e0e066b5f54bc1921cd Author: Matthew Garrett [EMAIL PROTECTED] Date: Wed Dec 26 02:03:26 2007 + ACPI: video: Rationalise ACPI backlight implementation The sysfs backlight class provides no mechanism for querying the acceptable brightness for a backlight. The ACPI spec states that values are only valid if they are reported as available by the firmware. Since we can't provide that information to userspace, instead collapse the range to the number of actual values that can be set. http://bugzilla.kernel.org/show_bug.cgi?id=9277 Signed-off-by: Matthew Garrett [EMAIL PROTECTED] Acked-by: Zhang Rui [EMAIL PROTECTED] Signed-off-by: Len Brown [EMAIL PROTECTED] commit 3fa2cdcc45a0176de15cac9dbf4ed2834ebf8932 Author: Matthew Garrett [EMAIL PROTECTED] Date: Thu Feb 7 01:44:06 2008 + ACPI: video: Ignore ACPI video devices that aren't present in hardware Vendors often ship machines with a choice of integrated or discrete graphics, and use the same DSDT for both. As a result, the ACPI video module will locate devices that may not exist on this specific platform. Attempt to determine whether the device exists or not, and abort the device creation if it do not exist. Signed-off-by: Matthew Garrett [EMAIL PROTECTED] Signed-off-by: Len Brown [EMAIL PROTECTED] ** Changed in: linux (Ubuntu) Importance: Undecided = Medium Assignee: (unassigned) = Ubuntu Kernel Team (ubuntu-kernel-team) Status: New = Triaged -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 121833] Re: LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle.
Should be in the next kernel upload ** Changed in: linux-source-2.6.22 (Ubuntu) Status: Incomplete = Won't Fix ** Changed in: linux (Ubuntu) Assignee: Ubuntu Kernel Team (ubuntu-kernel-team) = Ben Collins (ben-collins) Status: Triaged = In Progress ** Changed in: linux (Ubuntu) Status: In Progress = Fix Committed -- LCD backlight turns off when between discrete levels, both from hotkeys and from dim-on-idle. https://bugs.launchpad.net/bugs/121833 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
