Hi, I made a thread some time ago with a similar-seeming issue (no video upon waking from sleep). That was the same machine but a nvidia graphics card; currently an AMD Polaris card is employed running the mesa drivers.
The machine is set to suspend after 45mins of inactivity. Always works (even when Steam is running nowadays 😃 ) . About half the times however the machine will not wake up properly..it powers on, the fans start spinning, it "LEDs up", but there's no video output (RX580 -> DP) . Power button must be held down for the system to force shut off and then manually tuned on again.
Doing a sudo journalctl has consistently yielded:
aug 11 11:18:27 svartberg kernel: amdgpu 0000:01:00.0: [drm:amdgpu_ring_test_helper [amdgpu]] ERROR ring gfx test failed (-110)
aug 11 11:18:27 svartberg kernel: [drm:amdgpu_device_ip_resume_phase2 [amdgpu]] ERROR resume of IP block <gfx_v8_0> failed -110
aug 11 11:18:27 svartberg kernel: [drm:amdgpu_device_resume [amdgpu]] ERROR amdgpu_device_ip_resume failed (-110).
aug 11 11:18:27 svartberg kernel: PM: dpm_run_callback(): pci_pm_resume+0x0/0x90 returns -110
aug 11 11:18:27 svartberg kernel: PM: Device 0000:01:00.0 failed to resume async: error -110
followed by:
aug 11 11:18:27 svartberg kernel: Generic Realtek PHY r8169-700:00: attached PHY driver [Generic Realtek PHY] (mii_bus:phy_addr=r8169-700:00, irq=IGNORE)
aug 11 11:18:27 svartberg kernel: ata6.00: configured for UDMA/133
aug 11 11:18:27 svartberg kernel: ata6.00: Enabling discard_zeroes_data
aug 11 11:18:27 svartberg kernel: BUG: kernel NULL pointer dereference, address: 0000000000000008
aug 11 11:18:27 svartberg kernel: #PF: supervisor read access in kernel mode
aug 11 11:18:27 svartberg kernel: #PF: error_code(0x0000) - not-present page
aug 11 11:18:27 svartberg kernel: PGD 800000041d567067 P4D 800000041d567067 PUD 41ef4f067 PMD 0
aug 11 11:18:27 svartberg kernel: Oops: 0000 [#1] PREEMPT SMP PTI
aug 11 11:18:27 svartberg kernel: CPU: 1 PID: 871 Comm: Xorg Tainted: G O 5.2.7-123.current #1
aug 11 11:18:27 svartberg kernel: Hardware name: Gigabyte Technology Co., Ltd. Z170-HD3/Z170-HD3-CF, BIOS F22f 03/09/2018
aug 11 11:18:27 svartberg kernel: RIP: 0010:enable_link_dp+0x82/0x230 [amdgpu]
aug 11 11:18:27 svartberg kernel: Code: 0c 03 00 00 80 00 00 00 0f 84 52 01 00 00 69 44 24 14 78 69 00 00 31 d2 4c 89 f6 41 89 84 24 14 01 00 00 49 8b be 00 43 00 00 <48> 8b 47 08 48 8b 00 e8 92 3b 83 e1 49 >
aug 11 11:18:27 svartberg kernel: RSP: 0018:ffffc9000227b760 EFLAGS: 00010246
aug 11 11:18:27 svartberg kernel: RAX: 00000000000278d0 RBX: ffff888426070200 RCX: 0000000000000002
Any advice?