On Wednesday, August 26, 2015 09:47:11 Martin Graesslin wrote: > at Akademy we discussed some plans on how to handle screen brightness on > Wayland. Unfortunately I must say that this doesn't work at all as we > imagined > > > I had a look at what Weston is doing for brightness. It uses a forked > "libbacklight" which internally interacts with the sysfs brighness helpers. > > I integrated this into KWin and tried to change backlight. But this > obviously did not work as only root user is allowed to write to the sysfs > file.
It's worse, it apparently depends on the driver, for example on the Nexus5, the brightness is world-readable, on my intel laptop, it's root-only. > I then tried to open it with the logind wrapper, but logind doesn't > have support for this kind of files, so that unfortunately doesn't work > either. > > And here, poor fool, I stand once more, no wiser than I was before. We have > a file only root can write to, but we are not root. Adding a KAuth helper > to KWin would not gain us anything compared to having it in powerdevil. > > So I suggest that we drop the idea that KWin is responsible for backlight > and move this feature completely to powerdevil and use the KAuth helper. Sounds like the way forward. -- sebas http://www.kde.org | http://vizZzion.org | GPG Key ID: 9119 0EF9 _______________________________________________ Plasma-devel mailing list Plasma-devel@kde.org https://mail.kde.org/mailman/listinfo/plasma-devel
