I switched to kernel version 6.8.0-47-generic, because the nvidia client version was (automatically?) updated to that version, so the driver would no longer run.
Now it gets stuck on a bios screen, but not the first one. I usually only get the bios screen on one monitor, but now the screen goes black after that, then the bios screen appears on both monitors. As far as I can tell nothing happens from now on.
If I boot to recovery mode, then resume the boot, everything works. (It boots, the graphics driver works, etc. I don't notice anything out of the ordinary). I should mention though, that evertime I've done this I spent several minutes looking at journalctl/dmesg logs before resuming.I am by no means familiar with these log messages and I might well have missed something important.However, this stood out to me:
[ 738.264864] INFO: task systemd-udevd:407 blocked for more than 614 seconds.[ 738.264866] Tainted: P O 6.8.0-47-generic #47~22.04.1-Ubuntu[ 738.264868] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.[ 738.264870] task:systemd-udevd state:D stack:0 pid:407 tgid:407 ppid:386 flags:0x00000006[ 738.264875] Call Trace:[ 738.264877] <TASK>[ 738.264879] __schedule+0x27c/0x6a0[ 738.264885] schedule+0x33/0x110[ 738.264890] schedule_preempt_disabled+0x15/0x30[ 738.264893] __mutex_lock.constprop.0+0x3f8/0x7a0[ 738.264898] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264902] ? __memcg_slab_post_alloc_hook+0x18e/0x230[ 738.264907] __mutex_lock_slowpath+0x13/0x20[ 738.264911] mutex_lock+0x3c/0x50[ 738.264915] uevent_show+0xc4/0x170[ 738.264919] dev_attr_show+0x1d/0x70[ 738.264923] sysfs_kf_seq_show+0xa3/0x110[ 738.264926] kernfs_seq_show+0x27/0x40[ 738.264930] seq_read_iter+0x135/0x4a0[ 738.264935] kernfs_fop_read_iter+0x34/0x40[ 738.264939] vfs_read+0x258/0x390[ 738.264945] ksys_read+0x73/0x100[ 738.264949] __x64_sys_read+0x19/0x30[ 738.264952] x64_sys_call+0x23f0/0x24b0[ 738.264955] do_syscall_64+0x81/0x170[ 738.264961] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264964] ? syscall_exit_to_user_mode+0x86/0x260[ 738.264968] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264971] ? do_syscall_64+0x8d/0x170[ 738.264975] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264978] ? do_syscall_64+0x8d/0x170[ 738.264982] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264985] ? do_syscall_64+0x8d/0x170[ 738.264988] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264991] ? do_syscall_64+0x8d/0x170[ 738.264995] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.264998] ? do_syscall_64+0x8d/0x170[ 738.265001] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.265004] ? do_syscall_64+0x8d/0x170[ 738.265008] ? srso_alias_return_thunk+0x5/0xfbef5[ 738.265012] entry_SYSCALL_64_after_hwframe+0x78/0x80[ 738.265014] RIP: 0033:0x77bce91147e2[ 738.265020] RSP: 002b:00007fffbbc8af88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000[ 738.265023] RAX: ffffffffffffffda RBX: 0000000000001008 RCX: 000077bce91147e2[ 738.265025] RDX: 0000000000001008 RSI: 00005dd90875d140 RDI: 0000000000000010[ 738.265027] RBP: 00005dd90875d140 R08: 0000000000000000 R09: 00005dd90875d140[ 738.265029] R10: 000077bce921acf0 R11: 0000000000000246 R12: 0000000000000010[ 738.265031] R13: 0000000000001007 R14: 0000000000000002 R15: 00007fffbbc8afb0[ 738.265036] </TASK>What can I do to boot normally again?