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. -- 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