Hi, on my machine a Windows 11 guest still worked with [2022-11-01T17:48:40+0100] [ALPM] upgraded virtualbox-host-dkms (6.1.40-1 -> 7.0.2-1) [2022-11-01T17:48:40+0100] [ALPM] upgraded virtualbox (6.1.40-1 -> 7.0.2-1) [2022-11-01T17:48:40+0100] [ALPM] upgraded virtualbox-ext-oracle (6.1.40-1 -> 7.0.2-1) [2022-11-01T17:48:41+0100] [ALPM] upgraded virtualbox-guest-iso (6.1.40-1 -> 7.0.2-1) and a self build, rt patched linux 4.19.246_rt110-0.1000. A few settings are: 3D acceleration disable USB 3.0 enabled Network adapter attached to NAT The next time I run it (today) and it always does freeze, with [2022-11-05T11:36:20+0100] [ALPM] upgraded virtualbox-host-dkms (7.0.2-1 -> 7.0.2-2) [2022-11-05T11:36:20+0100] [ALPM] upgraded virtualbox (7.0.2-1 -> 7.0.2-2) and a self build, rt patched linux 1:4.19.255_rt113-0.1000 as well as with core/linux 6.0.8.arch1-1 threadirqs (not tested without threadirqs). FWIW I changed USB 3.0 enabled to USB 2.0 enabled, to no avail. [rocketmouse@archlinux ~]$ grep unresponsive /mnt/winos11/winos11/Logs/VBox.log 00:03:22.279545 VMMDev: vmmDevHeartbeatFlatlinedTimer: Guest seems to be unresponsive. Last heartbeat received 4 seconds ago [rocketmouse@archlinux ~]$ grep -i error /mnt/winos11/winos11/Logs/VBox.log 00:00:01.506420 TM: GIP - CPU: iCpuSet=0x0 idCpu=0x0 idApic=0x0 iGipCpu=0x1 i64TSCDelta=0 enmState=3 u64CpuHz=2793529547(*) cErrors=0 00:00:01.506423 TM: GIP - CPU: iCpuSet=0x1 idCpu=0x1 idApic=0x2 iGipCpu=0x0 i64TSCDelta=0 enmState=3 u64CpuHz=2793529898(*) cErrors=0 00:00:01.722439 HM: VM-entry Xcpt error-code optional = false 00:04:32.452728 /Devices/vga/VMSVGA/FifoErrors 0 times 00:04:32.452860 /Devices/vga/VMSVGA/Reg/GmrDescriptorWrite/Errors 0 times 00:04:32.454436 /PGM/PhysHandlerTree/ErrorsAllocatorR3 0 times 00:04:32.454438 /PGM/PhysHandlerTree/ErrorsTree 0 times 00:04:32.454712 /SELM/LoadHidSel/GstReadErrors 0 times The only differences are seemingly the same version of virtualbox build against another version of openssl and different kernels are used, while one of the tested kernels is an update of the 4.19 longterm kernel used when everything still was ok. I asked at https://bbs.archlinux.org/viewtopic.php?pid=2067415#p2067415 too and will report back to the mailing list, if it should be solved by the forum or to the forum, if it should be solved by the mailing list. Regards, Ralf
