Comment 43 for bug 1301125

I'm still getting this issue on Ubuntu 16.04. It is very annoying! When the screen goes to sleep, pressing any key will turn the laptop screen back on but neither the mouse or keyboard inputs appear to work on the login window. I can't press Ctrl+Alt+F1 either so my only option is a hard reset of the laptop.

uname -a
Linux sleekbook 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

*-display
       description: VGA compatible controller
       product: Trinity [Radeon HD 7500G]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 1
       bus info: pci@0000:00:01.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:30 memory:e0000000-efffffff ioport:3000(size=256) memory:f0300000-f033ffff

modinfo radeon
filename: /lib/modules/4.4.0-22-generic/kernel/drivers/gpu/drm/radeon/radeon.ko
license: GPL and additional rights
description: ATI Radeon
author: Gareth Hughes, Keith Whitwell, others.