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
Please attach the corresponding output of dmesg.
Created attachment 142872 [details] dmesg attachment with kernel 4.19.11 and amdgpu.dc=0
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
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.
Created attachment 142958 [details] [review] possible fix Looks like the stable patch autoselect strikes again! Does this backported patch fix the issue?
Thank you! This patch fixes the issue.
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