Adding options "acpi_osi=Linux acpi_backlight=legacy" in GRUB worked for me on my friend's computer... mostly. Although the brightness buttons can now control the backlight, Linux can't, and it still turns off once in a while (though it's easy enough to turn back on)
I really hope this gets fixed soon, it's a pain, and makes Ubuntu look pretty bad.
Adding options "acpi_osi=Linux acpi_backlight= legacy" in GRUB worked for me on my friend's computer... mostly. Although the brightness buttons can now control the backlight, Linux can't, and it still turns off once in a while (though it's easy enough to turn back on)
I really hope this gets fixed soon, it's a pain, and makes Ubuntu look pretty bad.