xserver-xorg-ati does not reactivate monitor after hibernate

[Alex Deucher]

On Mon, Feb 22, 2016 at 1:13 PM, Shawn H Corey <shawnhcorey at gmail.com> wrote:
>
> I'm running Linux Mint 17.2 with a Radeon HD 5770 card. When I restart
> the computer after hibernating, the monitor remains in low-energy mode.
> That means it is not receiving a signal from the card.
>
> I have tried pressing Ctrl+Alt+Del, which should bring up the Quit
> dialog with the Shutdown button as focus. And sure enough, after I
> press RETURN, the computer shuts down.
>
> I have also tried Ctrl+Alt+F1 but the monitor remains off. If I type
> blindly, I can log in and enter `sudo shutdown -r now` and sure enough,
> the computer reboots.
>
> Everything seems to be working but the monitor signal. What can I do to
> fix this?

File a bug:
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI
Select DRM/Radeon and attach your xorg log and dmesg output.

Alex