Package Details: intelpwm-udev 20180831-1

Git Clone URL: https://aur.archlinux.org/intelpwm-udev.git (read-only, click to copy)
Package Base: intelpwm-udev
Description: UDEV rules for setting backlight PWM frequency on Intel HD Graphics
Upstream URL: http://devbraindom.blogspot.com/2013/03/eliminate-led-screen-flicker-with-intel.html
Licenses: GPL
Submitter: edio
Maintainer: edio
Last Packager: edio
Votes: 12
Popularity: 0.000000
First Submitted: 2014-08-03 13:36 (UTC)
Last Updated: 2018-08-31 14:02 (UTC)

Dependencies (1)

Required by (0)

Sources (3)

Latest Comments

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edio commented on 2017-06-10 20:09 (UTC) (edited on 2017-06-10 20:13 (UTC) by edio)

@spijet Hi. This package is not on github (yet?). But feel free to do with the code whatever you want. Consider it as a public domain or wtf license :) (that differs from what is stated in the license section - I just noticed, but still copyleft :P)

spijet commented on 2017-06-02 19:14 (UTC)

Hey @edio, I wanted to ask you if you have this script hosted somewhere on GitHub (or any other Git hosting). I want to create an "intelpwm-udev" ebuild for Gentoo (as I switched over to Gentoo on my laptop) and I wanted to include your original version. If you don't host it anywhere else -- can I post my modified version on my GitHub page (and put your name in credits)? :P

spijet commented on 2017-01-05 04:12 (UTC)

It works well now, thanks a lot! :) Also, if you're interested, I took some liberty to modify it a little bit more so it could work with my backlight control script: http://ix.io/1PbT/sh This way the script dumps current PWM period (which is also the maximum backlight level) to /tmp/pwmfreq, which is used by my backlight script to calculate backlight level cap and delta correctly, depending on current PWM frequency: https://github.com/spijet/dotfiles/blob/master/herbstluftwm/helpers/backlight Maybe you'll find this useful too. :P

edio commented on 2017-01-04 23:58 (UTC)

I messed up with the pkg version previously. Accidentally used US-like date format, with day coming after year instead of month. So, for some, pkg manager may say it is a downgrade. Also, /etc/intelpwm.conf is now in backup array, thus should be preserved correctly between upgrades and on removal (unless -Rn is given). Hope it works well now.

spijet commented on 2017-01-04 17:08 (UTC)

I tested the update and it works, thanks! One problem though -- my config was already in the new format (with PERIOD="007d") and it got overwritten with default value, "0470". Could be bad for some users. :) Also, it seems that you've mistakenly bumped the version to 20170301 instead of 20170103. :D

edio commented on 2017-01-03 21:34 (UTC)

spijet, thanks for the fix! I did not have an issue, though, and this update does nothing for me, so can't check, if it really works. Probably, my hardware is too old. I also added post_upgrade hook to update /etc/intelpwm.conf from the old PERIOD value. I'd appreciate, if you test if it works for you (for me it works :) )

spijet commented on 2017-01-03 18:01 (UTC)

There's a small caveat with this scipt -- it resets the backlight level to maximum whenever it's run. That's because of the way it sets the register value. I changed it in a way that it reads current backlight level from the register and then sets it to "0x<PERIOD><backlight level>": #!/usr/bin/env sh source /etc/intelpwm.conf RAW_DATA="$(intel_reg read ${REGISTER})" CYCLE="${RAW_DATA:56:4}" intel_reg write "${REGISTER}" "0x${PERIOD}${CYCLE}" $PERIOD for me (Lenovo IdeaPad U330p) is "007d", which corresponds to 1500Hz PWM modulation frequency, and ~50% level for this setup looks like "0x007d003c".

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