[SOLVED] RX 550 GPU in Lenovo E580 not working properly

danielo · 2019-01-19 18:20:15

I have recently bought the Thinkpad E580 and it is fitted with a Radeon RX 550 GPU.
When invoking lspci, it yields:

02:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Lexa PRO [Radeon RX 550/550X] (rev c0)
	Subsystem: Lenovo Lexa PRO [Radeon RX 550/550X]
	Flags: bus master, fast devsel, latency 0, IRQ 134
	Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Memory at d0000000 (64-bit, prefetchable) [size=2M]
	I/O ports at d000 [size=256]
	Memory at f1300000 (32-bit, non-prefetchable) [size=256K]
	Expansion ROM at f1340000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu

for the GPU and

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) (prog-if 00 [VGA controller])
	Subsystem: Lenovo UHD Graphics 620
	Flags: bus master, fast devsel, latency 0, IRQ 133
	Memory at f0000000 (64-bit, non-prefetchable) [size=16M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at e000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

for the integrated graphics.
What I concluded from this:
The correct driver for my GPU is loaded but it is strangely not listed as a
VGA device. Also as the screen is tearing like crazy and it sure
seems like I'm not using the dedicated GPU at all. Would there be a
better way of making sure I'm not using it?
Is it possible that is has no display connector, even though it resides
in a laptop?

Also, when adding the Section "Device" config file for the amdgpu driver
to my xorg.conf.d LightDM will not start and neither will X.

I will also attach the logs from journalctl. Around line 1100 it says
"number of connectors is zero!". I could not find a matching report of
this problem from anybody else within a good hour of googling.
Also I'm all out of ideas.

https://pastebin.com/LX7VGf18

This is the output of journalctl. Also these are all the things I could
think of right now, I will happily provide any additional information.

Also I've had my share of linux related problems to solve, but I would
not consider myself experienced at all, please be forgiving in this regard.
Thank you in advance.

Last edited by danielo (2019-01-19 19:19:16)

jasonwryan · 2019-01-19 18:31:22

https://wiki.archlinux.org/index.php/AT … e_Graphics

danielo · 2019-01-19 18:34:38

Now I even read that section and just assumed it wasnt relevant for me.
Makes me feel kind of stupid.

I will mark this as solved or return once I have tried that.

danielo · 2019-01-19 19:17:33

I will now mark this as solved.

All the screen tearing is gone, although it had nothing to do with the issue I thought I had.
When using xrandr I noticed the integrated graphics had weird identifiers and
werent listed as "intel". Installing the proper intel drivers solved all my problems.

Arch Linux

#1 2019-01-19 18:20:15

[SOLVED] RX 550 GPU in Lenovo E580 not working properly

#2 2019-01-19 18:31:22

Re: [SOLVED] RX 550 GPU in Lenovo E580 not working properly

#3 2019-01-19 18:34:38

Re: [SOLVED] RX 550 GPU in Lenovo E580 not working properly

#4 2019-01-19 19:17:33

Re: [SOLVED] RX 550 GPU in Lenovo E580 not working properly

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