On Mon, Jun 22, 2015 at 21:14:06 +0200, Massimo Maiurana wrote: > Package: xserver-xorg-video-intel > Version: 2:2.99.917-1 > Severity: normal > > Dear Maintainer, > I was running a Jessie system until this morning, now I dist-upgraded to > Stretch and I have a problem which looks related to the intel driver. > I'm on an old Acer laptop, and before the upgrade the backlight controls > worked fine passing acpi_backlight=vendor and acpi_osi=Linux on the kernel > command line. > Now it doesn't work anymore, I can adjust backlight echoing a value in > /sys/class/backlight/intel_backlight/backlight but nor hotkeys neither > applets can adjust it. > After some googling I tried creating a configuration file in > /etc/X11/xorg.conf.d, to tell it to use intel_backlight instead of acer-wmi, > but it still doesn't work. > I saw that in /usr/X11/xorg.conf.d there is a file to tell the driver to use > UXA acceleration, but reading Xorg.log looks like SNA is used instead. > Also in Xorg.log it tells it's loading the platform driver, which has never > worked AFAIK, so I guess the problem is just that every option passed to the > driver is simply ignored. > Tried even adding video.use_native_backlight=1 on kernel command line with no > luck.
Please report kernel issues against the kernel. As for configuration of the X driver, sharing your actual config would help. Cheers, Julien
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