Created attachment 129131 [details] serial terminal capture (power on, login, shutdown) Hi, this bug is similar to Bug 98200. Since upgrade from kernel 4.8.17 to 4.9.{1,2,5} I am unable to restart or shutdown my PC. Poweroff/restart always ends with black screen (display shows "no signal"). System stays frozen with fans / hard discs spinning. Reset button does not bring the system back - it stays completely frozen. Only manual (power button) power off/on cycle brings the system back. GPU: [AMD/ATI] Juniper XT [Radeon HD 5770] I was able to capture kernel messages over serial line, last lines: ... [ 136.326236] systemd-shutdown[1]: All loop devices detached. [ 136.353887] kvm: exiting hardware virtualization [ 136.380090] Console: switching to colour VGA+ 80x25 [ 136.406675] [drm] radeon: finishing device. I tested kernel 4.9.1, 4.9.2 and 4.9.5.
I also have this problem: Kernel 4.9.5 and 4.9.4 both fail on restart or shutdown (same symptoms). Kernel 4.8.16 and earlier are OK. Video card: Advanced Micro Devices, Inc. [AMD/ATI] Redwood XT GL [FirePro V4800] Subsystem: Hewlett-Packard Company Device 2306 Physical Slot: 2 Flags: bus master, fast devsel, latency 0, IRQ 29 Memory at e0000000 (64-bit, prefetchable) [size=256M] Memory at f0100000 (64-bit, non-prefetchable) [size=128K] I/O ports at 2100 [size=256] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [50] Power Management version 3 Capabilities: [58] Express Legacy Endpoint, MSI 00 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?> Capabilities: [150] Advanced Error Reporting Capabilities: [240] Power Budgeting <?> Kernel driver in use: radeon Kernel modules: radeon Serial Capture logs show the same kernel data as for @wwa
Created attachment 129145 [details] [review] possible fix Does the attached patch help?
Yes, "possible fix" patch fixes the problem, tested with 4.9.5.
Bug fixed in 4.9.7, thanks.
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