[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
This issue is still present in Saucy. I have seen it happen with many laptops, including the HP Compaq 6910p laptop on which I am typing this. It spans across multiple Ubuntu releases. My deduction is that the brightness events are processed by two different recipients which creates the problem. The aforementioned brightness_switch_enabled=N setting seems to mute one of the receivers and thus serves as a functional temporary workaround for many computers. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
Same issue on my Thinkpad X201 (Ubuntu 13.04 64bits). I also noticed that if I click on an entry of the menu bar of any application (for example File menu of Firefox), then use the function buttons to increase/decrease brigthness : 1. Brigthness is increased/decreased in single steps. 2. The Brigthness indicator is not shown. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
After installing 3.5.0-18-generic in Ubuntu 12.04 Precise from official repository it seems to be fixed on my Thinkpad T500. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
It seems that echo N /sys/module/video/parameters/brightness_switch_enabled does help when decreasing the brightness, but when you increase it still goes up in 2 step. Still, waiting for the fix. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: gnome-power-manager (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
Same problem on Ubuntu 12.04 (3.2.0-26-generic) and Thinkpad T500 echo 0 | sudo tee /sys/module/video/parameters/brightness_switch_enabled or echo 4 /proc/acpi/ibm/cmos echo 5 /proc/acpi/ibm/cmos works - ~9 brightness steps instead of ~5 steps dmesg: thinkpad_acpi: detected a 8-level brightness capable ThinkPad -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
Same here. How do we change the stepping of screen brighteness thingie in X11? Text mode goes correctly from 0 to 8 here, but gnome changes it steps of 2. Thanks. ** Package changed: ubuntu = gnome-power-manager (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1000270] Re: Laptop backlight brightness increases/decreases 2 steps each time
Try adding the line shown above to /etc/rc.local, that fixed the brightness changes in X11 for me. Now it moves 1 step at a time in X11, however the brightness cannot be changed at all when not in X11! (That is, in text mode pressing the brightness up/down key has no effect.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000270 Title: Laptop backlight brightness increases/decreases 2 steps each time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
