Ubuntu: Suspend, resume, shutdown work in legacy but not UEFI in 16.04LTS on HP AMD/Radeon desktop?



Question:

I had Ubuntu 16.04 LTS 64-bit dual-booting (with Windows) on an HP Pavilion (see below for specs), and it worked fine.

Since wiping and installing 16.04 64-bit as only OS...suspend, resume, and shutdown do not work properly.

Attempts to boot from livedisk have confirmed that I have same problems with suspend, resume, and shutdown when booting from livedisk usb in UEFI mode. However, when booting from livedisk CD in legacy mode, everything works fine.

PROBLEM: Suspend turns off the screen, but leaves the fan running and leaves on the "on" light on the computer. Attempts to resume via keyboard press and power button press/hold are from that point completely unsuccessful. Can't even turn the computer off by holding the power button, in this state: I have to unplug the power cable to be able to turn it off and back on.

Shutdown freezes on the purple "Ubuntu" screen with the dots frozen. From this state, I am able to turn off power by holding power button and then turn back on with same button.

I have tried completely wiping/reinstalling, again, with the same results. I get the same results from systemctl suspend and systemctl poweroff as I do from using the GUI.

Kernel: Linux 4.4.0-89-generic (x86_64) Distribution: Ubuntu 16.04.3 LTS Processor: AMD A6-3600 APU with Radeon(tm) HD Graphics × 4 Graphics: Gallium 0.4 on AMD SUMO (DRM 2.43.0 / 4.4.0-89-generic, LLVM 4.0.0)

Results of lspci -nn | grep -E 'VGA|Display':

00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] BeaverCreek [Radeon HD 6530D] [1002:964a]  

EDIT: I just went ahead and reinstalled in legacy boot mode, and that fixed the problem; but why would these problems happen with UEFI?


Solution:1

Thank for the suggestion. I ended up reinstalling in legacy boot mode (which I had to do via CD, in my case), instead, and that fixed the problem for me.


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