Comment 13 for bug 213053

I have the "unkillable process" problem without fuse or totem being involved, on a headless server install, not running X.

Was installing sbcl (sudo apt-get install sbcl) inside a screen(1) session and now the apt process and the launched sbcl (which is trying to generate some cache or something) are both unkillable with kill -9 and killall -9.

The other interesting symptom is that pstree -p reports all processes fine, but ps aux actually locks up midway through its report.

When the sbcl install locked up for over an hour, I instinctively ctrl-c'd it and ran it again without noticing the first one had not died. Now I have multiple unkillable sbcl processes; I've attached the relevant section of pstree.

The screen session that launched those processes is also now unkillable, but other processes (new and old) are behaving normally.

If I reliably duplicate this, I'll post more info.