Recently, I updated with CachyOs Hello qt6 packages… After that CachyOS won’t boot. (Stuck at running hook plymouth). I tried to downgrade qt6-base, then tried to restore snapshot of Timeshift. Update messed me and I probably messed it (downgrade and restore). Long story short, I have to do mount /dev/sda2 /boot in order to boot. When I boot, files are there but no audio and ethernet connection… What to do in this case?
same here! (btw, system is up and you can log into console, but UI is broken….)
LG
Flo
you can check in here for more info (most of us already solved, and the way to solved is in there)
Same problem. It acts like it’s going to boot, runs all the way to the cachy os boot logo, and then sticks after “loading plymouth”.
solved with a :
sudo pacman -Syu
Always do complete upgrades 
best,
Flo
If I had internet to do that. No audio no internet, how to do syu then?
do you use btrfs and snapper? if yes you can go restore the snapshot before updating the qt6
Similar problem here, after the qt6 updates (yes, even after a. -Syu complete upgrade). Just get a blinking cursor on boot. I was at able to switch terminals (CTRL + Alt + F3/etc) and restore snapshot. Might wait to see if there’re newer updates
Seems CachyOS pacman downgraded the QT Upgrade again.
Came home from Work, started Cachy. Did an Update with the Cachy Update Tool. Then the Shutdown Button was not working, instead the complete UI hang up. Then used STRG ALT F3 to restart.
That did not work. Screen stand black after loading the Linux Kernel.
Anyway i hat to drive to my doctor. One Hour later i came back, entered Emergency Mode: STRG ALT F3, and Ran:
sudo pacman -Syu
Problem fixed. Propably i should activate Snapper (Too much bloat i think:)
Thanks floppi! Not sure how an update fixed the buggy qt6 package an hour after an update broke it…but I’ll take it.
For those hung at the “loading plymouth” point:
* Switch to a virtual terminal (CTRL+ALT+F2)
* Login
* Run sudo pacman -Syu
After update qt6, downgrade and timeshift. Emergency opens, gotta mount /dev/sda2 /boot, I’m not online (NO INTERNET - NO SYU)… No sudo syu can help me in this case. It seems faster to delete it all and install it again and watch forum for complications. Timeshift was never of any use ever for me…
do you have snapper installed ?
if so do:
- sudo snapper ls
- find the snapshot that preceeds the update of QT6
- btrfs subvolume get-default /
- verify if a snapshot is currently mounted
- if not, btrfs subvolume set-default /.snapshots/(latest snapshot number)/snapshot/
- then, sudo snapper rollback xx (clean snapshot number)
Afterwards reboot.
This is what i did to rollback. if i missed a step please do let me know.
You don’t need internet for this.
Seems to be fixed now. Just ran an update and working again.
There’s another thread about this. Today’s update was borked by a some missing updates for Qt6. You may have only gotten part of the required files, which caused the failure. https://discuss.cachyos.org/t/qt6-upgrade-to-6-10-1-breaks-sddm-plasma-delay-upgrading-until-plasma-workspace-6-5-3-2/19029/21
Have a snapper, but no snapshots. Same as Timeshift - restore points to have no audio or ethernet. Other options? Is there a way to just connect to ethernet to pacman syu? It seems that I need to re install distro… Then I see that I will have similar problems in future… Don’t bother about it, I won’t.
If you connect ethernet, then it should directly connect yes. you can run a ping to see about it.
Otherwise, you can use pacman to downgrade qt6. no need for internet to do that.
PS:
Check other threads about this problem from today. Answers from @cscs are really helpful with that.
if you still have access internet (not in current cachy)
you can :
- boot to live cd
- connect to internet there (wifi / ethernet)
- open konsole
- run sudo cachy-chroot
- mount your root volume
- after you successfully chroot, go sudo pacman -Syu there
- after that, go reboot
Thanks @Biscuits! Followed every step and it worked. Didn’t expect that. Thank you a lot!
Qt is a horribly unstable and bug riddled library. My medical device clients and I stopped using it years ago. Just look at the bug database! At one point in Qt 6.x, before the Atlasian migration it was 30K deep.
Install the Mate desktop with CachyOS to avoid all of the KDE and Qt bugs.
Had this horrible terrible problem two times on a row now. Did the above solution but I had no success. Everything went fine as layed out but I’m still stuck at running the Plymouth hook. Seems like I’m going for yet another reinstall. …or do you think I should rather boot from the previos version of the iso from august; I did the 28/11 iso now…
have you tried my solution ? aka boot from live cd and chroot there ?
if you turned on snapper option, you can revert to last snapshot as well though ?