Created attachment 277835 [details] dmesg when crash/freeze occurred updated from stock 4.15 kernel to 4.18-rc8. lightdm freezes on boot without boot param `nomodeset` everytime. graphical startup is proper with boot param `nomodeset`. not passing amdgpu.dc=1 as it has no effect. -- system -- kernel: 4.18-rc8 from https://github.com/M-Bab/linux-kernel-amdgpu-binaries cpu: AMD Ryzen 3 2200G with Radeon Vega Graphics mainboard: Gigabyte Technology Co., Ltd. A320M-S2H/A320M-S2H-CF, BIOS F22 03/15/2018 -- dmesg log summary -- multiple stack traces, varying everytime, with common line as: > [ 3.197767] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector > ObjectID from Adapter Service for connector index:2! type 0 expected 3
I'm unable to reproduce the issue you describe on the kernel you've linked. Do you still see the problem occur on a stock kernel or amd-staging-drm-next? Additional details on your setup would also be appreciated (Xorg log, monitor details, dmesg log with drm.debug=4, etc). If you think this is a regression then a bisection point could also help with debugging the issue, if any.
Problem is with kernel 4.18.0-rc8 build from a 3rd party => https://github.com/M-Bab/linux-kernel-amdgpu-binaries. Not sure if the amd-staging-drm-next is in it. It only says: "Kernel source code of amd-staging with DAL and latest security patches". So I doubt it has "amd-staging-drm-next". Seems like 4.18.1 is latest stable, will compile that myself tonight and check if i'm able to reproduce. Will get back with more details.
Might have committed a blunder while testing. I have a "DELL ST2220L" connected on analog VGA and "Panasonic Tv" connected on HDMI. All the while primary might have been selected as the TV and the extended desktop presented on VGA line, which I mistook as a hung lightdm/Xorg. But also upgraded the kernel to latest from git. Will revert back to 4.18.1 and test further. Sorry if this lead to any waste of your time.
Unable to reproduce any error with HDMI display unplugged, primary display is being selected as VGA device. Kernel used: Problem is with kernel 4.18.0 build from a 3rd party => https://github.com/M-Bab/linux-kernel-amdgpu-binaries. Still see a lot of error traces and [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:2! type 0 expected 3 Setting priority as low.
Created attachment 277921 [details] dmesg of 4.18.0 kernel with drm.debug=4