Recently Linux kernel 6.6.5 has serious problem caused No Internet connection via wifi, shutdown / reboot hangs at stopping daemon etc. and now Linux Kernel 6.6.6 has landed in Arch Linux official repository (core). it’s safe to upgrade your system system now. but always recommended always create snapshot via timeshift / snapper before upgrading your system to avoid breakage.
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It should be.
I am running it since a couple of hours with no issues (well, some minor issues to be worked out). Although, I didn’t have any issues with the previous either. But again every system is a universe of its own right.
Make sure you have a live usb in case you need to perform some “rescue operation” if anything goes sideways.
Personally, I don’t care for snapshots but that’s me.
These things happen. . . .grin and bear it. . . now I can re-install a ‘new’ and improved fresh version. . . . until the next fiasco happens. . . .
Rich;)
The devil sits in the details 
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I will wait a couple of days to upgrade to kernel 6.6.6.
I want to install it on the 13th. Because…reasons.
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Satan has now possessed my PC, and it’s sick.
KDE gets Alpha, Galileo gets released, and now kernel 666
This is the work of the devil for sure.
Devil’s in the details 
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I am now teaching myself not to upgrade until I know for sure that there is no bugs
It’s up to you. Btw last night i have upgrading Linux kernel 6.6.6 and rebooting last night and no problem. wifi working again as expected, shutdown no longer hangs at stopping WPA supplicant
can you logoff and logon ok? I cant after the update, I get blank screen after trying to log back in
I saw this post.
Somebody mentioned “you should make backup for your system”.
Install timeshift.
Run timeshift. Took too long. Realized it’s eating my 250gb SSD which currently only has 50gb of space after games I’ve installed.
Hastily cancelled the process. 6 GB of space magically occupied. Even after deleting timeshift folder.
What do now?
Personally (and i’m by no means a Linux Pro, nor do i know how Timeshift works) i’d just use “double commander” (it’s a file browser) and use it to show the space of each folder. Maybe you’ll be able to locate what’s taking the space that way.
I also don’t use any of that backup tools since i don’t use btrfs and don’t want to waste space (in the end this is mostly a gaming PC and my important stuff is located on a different drive anyway). I just installed the LTS Kernel… so in case Mainline Kernel is causing Issues i’ll just switch to that one for a while.
I would suggest to open a new thread with appropriate title to get proper attention to your issue.
As this thread is about the Linux kernel, your post may go unnoticed by many forum members.
If you add idkfa to your kernel cmd-line, it’ll launch UEFI-DOOM instead.