While bysecting (I hope to complete tomorrow) I found a workaround (that works for me on Acer 720P).
I always had tpm_tis.force=1 on the kernel command line. Now I added tpm_tis.interrupts=0. Wakes fine now with linux 5.6.0. Full command line: Kernel command line: BOOT_IMAGE=/@boot/vmlinuz-5.6.0-1011-oem root=UUID=17d2cd1d-cc37-446d-ac0b-933def63c867 ro rootflags=subvol=@ quiet splash tpm_tis.force=1 tpm_tis.interrupts=0 modprobe.blacklist=ehci_hcd,ehci-pci vt.handoff=7 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848771 Title: Reboot after resume from suspend (deep) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848771/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
