Brightness only moves between 100% and 0% on Lenovo SL510
Posted: Wed Feb 27, 2013 9:43 pm
I have a Lenovo SL510 laptop, and the brightness appears to only have two settings: 100% and 0%. If I use the brightness keys on the laptop and decrease the brightness, it immediately drops to 0%. The same thing happens if I increase the brightness; it automatically jumps to 100%.
From lsmod, these are the acpi kernel modules I have installed:
From uname -r, my kernel version is 3.2.0-4-amd64.
Is there any other information I need to provide to troubleshoot this?
From lsmod, these are the acpi kernel modules I have installed:
Code: Select all
Module Size Used by
thinkpad_acpi 61270 0
nvram 13049 1 thinkpad_acpi
acpi_cpufreq 12935 1
snd 52850 17 snd_timer,snd_seq_device,snd_seq,snd_rawmidi,thinkpad_acpi,snd_pcm,snd_mixer_oss,snd_pcm_oss,snd_hwdep,snd_hda_codec,snd_hda_intel,snd_hda_codec_realtek,snd_hda_codec_hdmi
rfkill 19012 6 cfg80211,thinkpad_acpi,bluetooth
mperf 12453 1 acpi_cpufreq
processor 28157 3 acpi_cpufreq
Is there any other information I need to provide to troubleshoot this?