Bug 109122

Summary:

blank screen on rx580 starting with kernel 4.19.9

Product:

DRI

Reporter:

velemas

Component:

DRM/AMDgpu

Assignee:

Default DRI bug account <dri-devel>

Status:

RESOLVED FIXED

QA Contact:

Severity:

critical

Priority:

medium

CC:

harry.wentland, nicholas.kazlauskas

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
dmesg attachment with kernel 4.19.11 and amdgpu.dc=0	none
possible fix	none

Description velemas 2018-12-20 21:13:13 UTC

After upgrading to kernel 4.19.9 in Arch Linux I have a blank screen. The system is unusable.

My system is Asus ROG GL702ZC with RX 580:

lspci output:
description: VGA compatible controller
product: Ellesmere [Radeon RX 470/480/570/570X/580/580X]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:0c:00.0
version: c1
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=amdgpu latency=0

dmesg:
[drm] initializing kernel modesetting (POLARIS10 0x1002:0x67DF 0x1043:0x1A60 0xC1).

The culprit is https://github.com/torvalds/linux/commit/07e3a1cfb0568b6d8d7862077029af96af6690ea

Reverting it fixed the issue. I also tried 4.20-rc7. There is no issue there. But 4.19.11 still has it.

Setting amdgpu.dc=0 also helps with 4.19.9 - 4.19.11

Related https://bugs.archlinux.org/task/61117

Comment 1 Michel Dänzer 2018-12-21 09:16:12 UTC

Please attach the corresponding output of dmesg.

Comment 2 velemas 2018-12-21 17:12:00 UTC

Created attachment 142872 [details]
dmesg attachment with kernel 4.19.11 and amdgpu.dc=0

Comment 3 Matej Lach 2018-12-27 12:08:57 UTC

I can confirm this bug is indeed present. 
Worth noting that the screen is only blank on the laptop built-in display, (after KMS), external monitors work fine. 

Adding `amdgpu.dc=0` to the kernel parameters resolves the issue for me, but this was not necessary before kernel 4.19.9, so it seems like a regression. [1] seems related.

1 - https://bugzilla.kernel.org/show_bug.cgi?id=200695

Comment 4 Nicholas Kazlauskas 2019-01-03 15:00:00 UTC

This should be fixed by: https://patchwork.freedesktop.org/patch/264792/

It's probably why you don't see the issue occur in 4.20-rc7.

Comment 5 Alex Deucher 2019-01-03 15:47:05 UTC

Created attachment 142958 [details] [review]
possible fix

Looks like the stable patch autoselect strikes again!  Does this backported patch fix the issue?

Comment 6 velemas 2019-01-03 19:29:43 UTC

Thank you! This patch fixes the issue.

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