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as described in https://forum.turris.cz/t/devpts-readonly-after-lxc-stop/14151

I need some help fixing my lxc conf after 3to5 migration. After issuing lxc-stop -n mylxc I'm unable to start it back:

root@turris:~# lxc-start -F -n mylxc
lxc-start: mylxc: conf.c: lxc_setup_ttydir_console: 1831 Read-only file system - Failed to set mode "0110" to "/dev/pts/3"
                                                                                                                         lxc-start: mylxc: conf.c: lxc_setup: 3625 Failed to setup console

The fix is to issue a mount -o remount,rw /dev/pts then lxc-start works as expected.

My lxc.conf and default.conf are using the default values:

root@turris:~# cat /etc/lxc/lxc.conf
lxc.lxcpath = /srv/lxc
root@turris:~# cat /etc/lxc/default.conf
lxc.net.0.type = veth
lxc.net.0.link = br-lan
lxc.net.0.flags = up
lxc.net.0.name = eth0
# Some workarounds
lxc.include = /usr/share/lxc/config/common.conf
lxc.hook.start-host = /usr/share/lxc/hooks/systemd-workaround
# Template to generate fixed MAC address
lxc.net.0.hwaddr = x2:xx:xx:xx:xx:xx