When the kernel tries to kill a process or unmount a file system, it
makes a system call which can result in something called an
"uninterruptable sleep". Processes in an uninterruptable sleep state are
marked with a D (I think) in the process table. You can see that with ps
or top. Symptoms of a process in an uninterruptable sleep state are that
if you do a df or an lsusb, it hangs and you can't even control-c out.
There might be other ways to get the same result. But try doing a df and
an lsusb before shutting down and it they hang, you know it's a kernel bug .
On 07/02/2016 03:54 AM, Mark Peveto wrote:
Hi all,
The short version of a long story. I've just installed sonar on a dell pc.
I've also got it installed on a compaq/hp machine, where the followig
problem doesn't exist. On the dell, sudo reboot seems to hang. Sudo shutdown
works fine. I've tried sudo shutdown -r now, sudo systemctl reboot, and
other options. How, without sighted help, can I find out what's causing this
machine to hang when I reboot. What's strange is this...why does it shut
down just fine, but not reboot?
Mark Peveto
Registered Linux user number 600552
Sent from sonar using alpine 2.20.13
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