On focal with -proposed repo enabled. Updated all packages and rebooted. Upon entering the LUKS passphrase for disk decryption I get the following message, and cannot boot:
"libgcc_s.so.1 must be installed for pthread_cancel to work"
Booting with the previous kernel works.
Found this question with an identical issue: https://askubuntu.com/questions/1190687/ubuntu-19-10-missing-lib-gcc-so-1-after-kernel-update, which points to "/usr/share/initramfs-tools/hooks/cryptroot" being unable to find that lib. It was looking in "/lib/x86_64-linux-gnu/", but libgcc_s.so.1 is not there, but at "/usr/lib/" and "/usr/lib/x86_64-linux-gnu/". Temporarily fixed by copying the file to "/lib/x86_64-linux-gnu/" and regenerating the initramdisk.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: libgcc1 1:10-20200202-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-13.16-generic 5.4.16
Uname: Linux 5.4.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu16
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Feb 4 00:05:48 2020
InstallationDate: Installed on 2019-09-23 (133 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190917)
SourcePackage: gcc-10
UpgradeStatus: Upgraded to focal on 2020-01-24 (10 days ago)
On February 3, 2020 7:28:50 PM PST, Launchpad Bug Tracker <email address hidden> wrote:
>You have been subscribed to a public bug:
>
>On focal with -proposed repo enabled.
You have identified a bug, but this is not a supported end user configuration. I believe the fix for this issue is already in progress, if not already resolved in -proposed.