Comment 10 for bug 1971571

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Stefan Fleischmann (sfleischmann) wrote : Re: ubuntu 22.04 cgroup2 works for clean install but upgrade to 22.04 causes cgroup2 problems

In my case this turned out to be a case of cgroup on top of cgroup2. Our workload manager seems to mount the freezer cgroup:

$ grep cgroup /proc/mounts
cgroup2 /sys/fs/cgroup cgroup2 rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0

If I unmount /sys/fs/cgroup/freezer I can start my containers again.