On Sat, Dec 03, 2016 at 10:57:58PM +0100, Alain wrote: > Package: libdrm2 > Version: 2.4.73-1~bpo8+1 > Severity: normal > > The scale of change of the intensity of the backlight is wrong. > Changing this is done with the hot keys to increase or decrease. > > The minimum get a black screen. > cat /sys/class/backlight/eeepc/brigthness > 0 > cat /sys/class/backlight/intel_backlight/brigthness > 0 > > 1st press on the hot key : get also a black screen. > cat /sys/class/backlight/eeepc/brigthness > 1 > cat /sys/class/backlight/intel_backlight/brigthness > 79787 > > 2nd press : get a medium intensity. > cat /sys/class/backlight/eeepc/brigthness > 2 > cat /sys/class/backlight/intel_backlight/brigthness > 159374 > > 3rd to 12th press get a normal change of the backlight. > To : 796875 > But the intensity of the 12th is less than the 11th. > > Expected : > The minimum should not light off the screen. > /sys/class/backlight/intel_backlight/brigthness > 159374 > >From /sys/class/backlight/eeepc/brigthness=1 to 10 or 12, the backlight > should change linearly without light off. > > This buggy behaviour was seen only with Xfce, not with lightdm or the Linux > console. > > The older libdrm and xserver-xorg work fine.
Which older versions? Do you mean xserver-xorg-video-intel? I guess it's related to the last upload of xserver-xorg-video-intel to jessie-backports. Please attach the Xorg log and the output from dmesg. Thanks, Andreas > > -- System Information: > Debian Release: 8.6 > APT prefers stable-updates > APT policy: (500, 'stable-updates'), (500, 'stable') > Architecture: i386 (i686) > > Kernel: Linux 4.7.0-0.bpo.1-686-pae (SMP w/2 CPU cores) > Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) > > Versions of packages libdrm2 depends on: > ii libc6 2.19-18+deb8u6 > ii multiarch-support 2.19-18+deb8u6 > > libdrm2 recommends no packages. > > libdrm2 suggests no packages. > > -- no debconf information
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