Working on my Lenovo Ideapad U350. lspci 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) 00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
Needed both boot parameters, acpi_backlight=vendor && thinkpad_acpi.brightness_enable=0 added to /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor thinkpad_acpi.brightness_enable=0" GRUB_CMDLINE_LINUX="acpi_backlight=vendor thinkpad_acpi.brightness_enable=0" after that, sudo update-grub. The gnome applet for the panel is not working, but the keys work perfectly. Thank you very much, Kamal. -- Screen brightness control fails on Dell Studio 1558 https://bugs.launchpad.net/bugs/568611 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
