when i add the mount option hidepid=0 for /proc, the shutdown of kde/X11 is broken and the xsession hangs instead of shutting the machine down. i don't know if it's elogind or kde/X11 realted Reproducible: Always Steps to Reproduce: 1. mount /proc with hidepid=0 2. start kde from sddm 3. select "shutdown" from menu Actual Results: all gui parts get closed, only a black screen is shown and i can still move the mouse cursor Expected Results: the machine shuts down a logout of the kde session works as expected, therefore it seems to me it's elogind related. I use openrc, elogind and X11
From the kernel documentation: "hidepid=off or hidepid=0 means classic mode - everybody may access all /proc/<pid>/ directories (default)." hidepid=0 or off, means default behavior, all /proc access is allowed. unchanged. Please double check and confirm what I think you are saying - that you setting the parameter to 0, which should already be at defaults, somehow causes misbehavior ?
this was a typo - i ment hidepid=2
hidepid=2 may be unsupported and special consideration always needs to be taken into account. and I believe its Elogind related. try this suggestion: https://wiki.gentoo.org/wiki/Elogind/en#Conflict_when_using_hidepid_in_proc It explains the use of the gid= param to assign groups special /proc permissions. Add a "gid=polkitd" mount option Reasoning: "If hidepid= option is used then some system services like (PolicyKit or D-Bus) are not able to query information about the clients which are connecting to them. This is because all these services run as non-privileged (i.e. euid != 0) and hence don't see needed information in /proc/[pid] directory of the client, unless the client runs under the same uid which is never the case (at least for PolicyKit and D-Bus)." (sourced from this: https://security.stackexchange.com/a/267658 ) There might also be other daemons running as alternate users that need other groups tweaked too. GL
I feel like this is working as expected...
