Ubuntu
linux package

  1. Bug #1086921
  2. Comment #11

Comment 11 for bug 1086921

Revision history for this message
Seth Forshee (sforshee) wrote : Re: include samsung-backlight fix in main kernel

samsung-laptop is not loaded, although it should be. Just to verify there isn't some problem with the kernel, please run the following in a terminal.

  modprobe -nv dmi:bvnPhoenixTechnologiesLtd.:bvr01HG.M011.20101209.RHU:bd12/09/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN250P:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN250P:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:

This should output something like 'insmod /lib/modules/.../samsung-laptop.ko'. Please verify this is the case. If so, then I suspect the packages you had installed may have put a blacklist on samsung-laptop and didn't remove it. To check for this run 'grep samsung /etc/modprobe.d/*'. If this finds any files containing a line that reads 'blacklist samsung-laptop' you can remove the blacklist by opening the affected file(s) as root and removing that line.

Please also try loading samsung-laptop by running 'sudo modprobe samsung-laptop'. Verify that it now appears in the lsmod output (if not please attach the output from dmesg). Then check whether or not the contents of /sys/class/backlight have changed. If there's now a "samsung" backlight present try adjusting the backlight with the Fn keys and see whether it works. If there's no samsung backlight even with samsung-laptop loaded, let me know and I can give you a test kernel that might help.

Thanks!