Package: libgcc1 Version: 1:10-20200202-1 Followup-For: Bug #950551 Same here. Did apt dist-upgrade and rebooted, then the libgcc_s.so.1 error message appeared.
Tried OP method and worked: 1) Boot to an Ubuntu live USB 2) sudo cryptsetup open ... 3) chroot 4) Downgrade libgcc1 from 1:10-20200202-1 to 1:9.2.1-25 5) update-initramfs -u After system restored, I upgraded libgcc1 again to reconfirm the problem. This time, instead of downgrading libgcc1 in step 4, I just made symbolic link to the file /lib/libgcc_s.so.1 under /lib/x86_64-linux-gnu/ This also worked for me. -- System Information: Debian Release: bullseye/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 5.4.0-3-amd64 (SMP w/8 CPU cores) Kernel taint flags: TAINT_CRAP, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_HK.UTF-8, LC_CTYPE=en_HK.UTF-8 (charmap=UTF-8), LANGUAGE=en_HK:en (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages libgcc1 depends on: ii gcc-10-base 10-20200202-1 ii libc6 2.29-9 ii libgcc-s1 10-20200202-1 libgcc1 recommends no packages. libgcc1 suggests no packages.
