Update – stability confirmation on 6.13.12 After extended real-world testing, I can now confirm:
Kernel 6.13.12-061312-generic is fully stable on my system. Multiple consecutive suspend/resume cycles (10+) succeed without HDMI signal loss. Environment: Zorin OS 18 Core (Ubuntu 24.10-based) Wayland session Radeon R9 380 (Tonga XT, amdgpu) Ryzen 5 5500 B450 Aorus Pro WIFI (BIOS F66) HDMI 1080p60 direct connection Behavior summary: • 6.12.x → fully stable • 6.13.12 → fully stable in extended testing • 6.14+ → resume instability begins • 6.17.0-14 → reproducible HDMI black screen after 1–2 suspend cycles This narrows the regression window between 6.13 and 6.14. Symptoms in broken kernels: System resumes (fans/LEDs active) Monitor reports no signal / out of range dmesg shows EDID-related errors on HDMI-A-1 during resume Requires hard reboot to restore display Given that 6.13.12 is stable and 6.14+ is not, this may be related to display reinitialization, EDID re-probing, or DC changes introduced after 6.13. I’m willing to: Test 6.14.x point releases Collect comparative dmesg logs (6.13 vs 6.17) Help narrow down specific commits if needed My goal is to return to the latest stable kernel once the regression is resolved. -- 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
