<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [regression] Backlight too dim to use from kernel 3.14 and systemd error" href="https://bugs.freedesktop.org/show_bug.cgi?id=78200#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [regression] Backlight too dim to use from kernel 3.14 and systemd error" href="https://bugs.freedesktop.org/show_bug.cgi?id=78200">bug 78200</a> from <a class="email" href="mailto:mike.cloaked@gmail.com" title="Mike C <mike.cloaked@gmail.com>"> Mike C</a> <pre>There was a single file in /var/lib/systemd/backlight/ which I deleted - on rebooting the symptoms were the same as before, and the file was recreated. I also booted with systemd.restore_state=0 on the kernel line, and this did make a difference in that the brightness then remained full until and including when the KDM login greeter was on the screen, but once I entered the user password the screen then dimmed, as before, between entering the login details and the user being logged in to the KDE desktop. Again using the keyboard Fn+up arrow just once restores the brightness. There was a boot error on the screen during this test with the systemd failure to save/restore but it went past quickly so I will attach the journal log shortly soon after the boot and login. This was with kernel 3.14.2-1-ARCH. I had previously built kernel 3.15rc3-1 and tested on the same laptop but it made no difference to the screen dimming issue. (It takes over three hours to build a kernel on that machine and I have no other 32 bit machine to run builds for that architecture.) So unless there has been commits that might provide a fix since rc3 then I guess that this issue remains unresolved. I am still not clear if this is a kernel issue or a systemd issue? However the same version of systemd gave a working system for the earlier 3.13 kernels and a broken system with 3.14 and 3.15 so maybe the answer lies in the kernel?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>