Instead of blacklisting the video module, I found a new workaround: $ echo "options video brightness_switch_enabled=0" | sudo tee /etc/modprobe.d/video.conf This again gives me 10 levels of brightness on my laptop instead of just 5.
I wonder if the video module can special-case some hardware configurations, so that brightness_switch_enabled is false for them by default. It appears to contain some list of Acer Aspire models, but not mine: # strings /lib/modules/2.6.32-24-generic-pae/kernel/drivers/acpi/video.ko | grep "Acer Aspire" Acer Aspire 5720 Acer Aspire 5710Z Acer Aspire 5315 Acer Aspire 7720 # dmidecode -s system-product-name Aspire 5920G -- Acer Aspire 5920G - some Fn keys not working https://bugs.launchpad.net/bugs/338328 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
