Full amdgpu suspend/resume log attached for analysis. Additional technical findings:
- System originally uses deep sleep (S3). - Forcing s2idle worsens the issue (screen powers off but system does not properly suspend). - After resume or cold boot, monitor sometimes shows "HDMI Out of Range" before Zorin OS loads. - Kernel logs show: amdgpu: *ERROR* HDMI-A-1: probed a monitor but no|invalid EDID - xhci_hcd resume errors were previously present but disabling XHC0/XHC1 wake reduced unwanted wake events. Hardware: - Radeon R9 380 (amdgpu, radeonsi) - HDMI connection - Corsair CX650 PSU - Gigabyte B450 Aorus Pro WIFI Issue appears related to HDMI EDID re-detection during suspend/resume or early boot. Full amdgpu log attached. ** Attachment added: "log_amdgpu.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2142389/+attachment/5948183/+files/log_amdgpu.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2142389 Title: amdgpu (R9 380) fails to resume from suspend (deep sleep) – black screen, requires hard reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2142389/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
