Ubuntu 16.04 with Radeon R7 250 freezes after suspend

Solution 1:

Run sudo -H gedit /etc/default/grub and change

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash'"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi='!Windows 2013' acpi_osi='!Windows 2012'"

Then,

sudo update-grub

Reboot twice!! This worked for me fine.

Solution 2:

Installing tlp (Advanced Linux Power Management) can help to solve this problem:

sudo apt-get install tlp tlp-rdw
sudo tlp start

I tried this on Linux Mint 18.1 64bit (Kernel 4.4.0-62-generic) on Lenovo s205. More information about tlp: Advanced Linux Power Management

Solution 3:

I have the same card but I am running 14.04 and using the open source drivers. There is a bug in the driver which prevents the system from waking up after suspend operation.

I believe the bug just got carried forward to the new drivers.