Ubuntu 18.04.2 unresponsive on hd activity

[Colin Law]

On Mon, 25 Feb 2019 at 03:50, <nibbli at gmx.de> wrote:
>
> Hello,
>
> When stuff is written to hd, my Ubuntu 18.04.2 gets kind of unresponsive.
>
> To reproduce:
> echo /dev/zero > test
>
> Then click the Google Chrome icon (or anything else) on the left. The program doesn’t start until CTRL+C on aforementioned command. The disk is a mini PCI SSD. Changing the scheduler on the disk to “noop” doesn't help. It is a laptop Dell Precision M4600 with chipset Mobile Intel QM67 Express. Can anyone reproduce this? Regards

It should return from that command immediately.  If you run
tail -f /var/log/syslog
in one terminal, then the echo in another do you see anything interesting?

Colin