Tried your suggestion, but it didn't help so far. Latest kernel still can't have gnome started, while 5.0 HWE kernel produced result similar to previous ones.
I have verified that environment variable was set successfully: $ printenv | grep -i amd_debug AMD_DEBUG=nodcc syslog: steam.desktop[3741]: STEAM_RUNTIME_HEAVY: ./steam-runtime-heavy kernel: gmc_v9_0_process_interrupt: 49 callbacks suppressed kernel: amdgpu 0000:08:00.0: [gfxhub] VMC page fault (src_id:0 ring:158 vmid:2 pasid:32784, for process vulkandriverque pid 4088 thread vulkandriverque pid 4088) kernel: amdgpu 0000:08:00.0: in page starting at address 0x0000000000000000 from 27 kernel: amdgpu 0000:08:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x0020153D drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=5205, emitted seq=5207 kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process vulkandriverque pid 4088 thread vulkandriverque pid 4088 kernel: [drm] GPU recovery disabled. ** Attachment added: "syslog-5.0-hwe-amd_debug.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1839758/+attachment/5282225/+files/syslog-5.0-hwe-amd_debug.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1839758 Title: [amdgpu] System locks up with VMC page fault on Ryzen 2400G and HWE kernel 5.0. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1839758/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
