Created attachment 117828 [details] dmesg output Hibernation works perfectly when using the integrated Intel GPU, but it only works once when using the discrete AMD Radeon R7 265. I am testing different GPUs by changing the primary GPU in BIOS. When trying to hibernate for the second time, I see one of 2 outcomes: 1. Display powers off, but the system stays on and stops responding to ICMP pings and sysrq; after reset the system boots afresh and fsck is run. 2. System powers off, but doesn't resume on next boot: boots afresh and fsck is run. More observations: * Suspend to RAM works every time. * Hibernation works every time as long as X has not been started. * I am running Arch Linux, swap is on an SSD and not encrypted. I usually start hibernation with `systemctl hibernate`, but writing to /sys/power/state has the same effect. I have no idea how to debug this issue, but would be happy to do it with your help.
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