Re: [ltp] Debian Wheezy w/XFCE screen brightness step value
On Tue, Feb 21, 2012 at 10:39:00AM -0600, Nate Bargmann wrote: > I do recall that GNOME had the same issue and probably requires a > similar "fix". I can confirm. In a GNOME Shell session in Ubuntu 11.10 the brightness goes from 15 down to 12 then down to 9 when I press Fn-End twice. Bug: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/527157 Upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=601410 The bug seems to be stuck in limbo :( Marius Gedminas -- Committee, n.: A group of men who individually can do nothing but as a group decide that nothing can be done. -- Fred Allen signature.asc Description: Digital signature
Re: [ltp] Debian Wheezy w/XFCE screen brightness step value
* On 2012 21 Feb 09:04 -0600, Henrique de Moraes Holschuh wrote: > You can actually ask thinkpad-acpi to rat out the PIDs of processes messing > with brightness values [through thinkpad-acpi], check the documentation. I managed to do that by reloading the module as per the docs: $ sudo modprobe thinkpad_acpi debug=0x8000 This allows debugging of PIDs. However, on this Debian system I finally found the output in /var/log/auth.log! Huh? Whatever. I guess it uses policytkit to handle the event. What I found is: Executing command [USER=root] [TTY=unknown] [CWD=/] [COMMAND=/usr/sb in/xfpm-power-backlight-helper --set-brightness 3] Which led to Debian bug report 627336: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627336 Which, in turn, leads to this XFCE report: https://bugzilla.xfce.org/show_bug.cgi?id=7541 Comments 13 and 15 describe how to disable xfpm from handling the backlight. I used the following commands: $ xfconf-query -c xfce4-power-manager -n -t bool -p /xfce4-power-manager/change-brightness-on-key-events -s false $ xfconf-query -c xfce4-power-manager -n -t bool -p /xfce4-power-manager/show-brightness-popup -s false I can report that the eight brightness levels are restored by the first command and the OSD is disabled by the second. I do recall that GNOME had the same issue and probably requires a similar "fix". - Nate >> -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Ham radio, Linux, bikes, and more: http://www.n0nb.us -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
Re: [ltp] Debian Wheezy w/XFCE screen brightness step value
On Mon, 20 Feb 2012, Nate Bargmann wrote: > I put a fresh installation of Debian Wheezy (Testing) on my T60 a couple > of weeks ago (long story) using XFCE desktop as the setup. I've noted, Disable acpi video and disable thinkpad-acpi brightness control. This will make sure no idiotic fluff in userspace will be able to screw with your brightness control, unless it does it through X.org (which may or may not control brightness, depends on the thinkpad model, and I don't recall whether the T60 has EC-based brightness control or GPU-based brightness control). You can actually ask thinkpad-acpi to rat out the PIDs of processes messing with brightness values [through thinkpad-acpi], check the documentation. > with some annoyance, that when I change the screen brightness with the > Fn-Home/End keys that occasionally a graphical brightness icon appears > and when it does, the screen is dimmed or brightened in multiple steps. > The T60 has eight brightness levels and when this icon appears it cuts > it to about 4 levels. This typically means broken crap that reacts to brightness *change* events as if they were keypresses. Thinkpad-acpi doesn't issue those events by default exactly for that reason, but some distros insist in breaking things. IMMV. I have no idea what exactly happens when ACPI video is active, but it is likely that it can be subject to the same problem. You can even get it broken three times over, by forcing both thinkpad-acpi AND acpi-video to issue the events, and react to both events by messing with the display brightness. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
Re: [ltp] Debian Wheezy w/XFCE screen brightness step value
Something in Sid changed recently to only provide 5 different brightness settings with my X220. It's slightly annoying but I've decided to live with it for the moment than to investigate what happened. Also running XFCE. -- Rubin [email protected] signature.asc Description: OpenPGP digital signature
