pappkamerad I think there was a regression with the LTS kernel on some newer hardware. We are all waiting on upstream to release a new version. I'll be creating a post shortly to get some feedback around LTS.
Recent update switched to LTS kernel, boot fails, manual steps required.
DataDrake thanks for the update!
3 years later
DataDrake This was helpful for me today. Ran update to get the latest firefox & brave updates with other stuff, and it returned this for the second time in a week : 
The Manual changing may have helped me, Thank You so Much !!
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catfishsushi Your EFI boot partition is too small.
I have 3 drives on my system, Windows 10, linux Solus on one and a fresh install of Solus on another. Right now, i am having issues trying to both: connect to Twitch on the Fresh install-- (Which shows "Unsupported Browser Type") even after updating the OS, the other version on Solus was....my bad, typed in commands to force an update of the kernel to 'clr-boot-manager' which..has erased the boot record/and/or messed up its ability to boot.....the Kernel is the 6.3.6-239 and its not working. the edit menu command line does not allow for clr-boot-manager to work/run.
So, to get around the unsupported browser type issue, i tried installing a VPN, when i try to activate it, the KDE-wallet pops up asking for a password. so, i went to settings and tried to disable it...but it seems i don't have permission to turn that off, and thus, the VPN will not connect. Being objective oriented, I booted in windows 10...and it connected to twitch. In the meantime, i'm stuck needing a means of re-installing and/or grafting a new kernel to my Primary Solus installation. Any ideas/help?
Also, i'm seeing this again:
Please either put this into an issue report, or another forum thread instead of keeping on adding to this very old thread.
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