I had this problem on a Compaq Mini 730eo, which according to https://wiki.ubuntu.com/HardwareSupport/Machines/Netbooks#Compaq%20Mini%20730EO is supposed to work perfectly.
adding acpi_os_name=Linux works for me.
I had this problem on a Compaq Mini 730eo, which according to https:/ /wiki.ubuntu. com/HardwareSup port/Machines/ Netbooks# Compaq% 20Mini% 20730EO is supposed to work perfectly.
adding acpi_os_name=Linux works for me.