HELP! Cannot use mouse or keyboard any more

Kevin O'Gorman kogorman at
Sat Jun 6 16:02:30 UTC 2015

On Sat, Jun 6, 2015 at 8:14 AM, Colin Law <clanlaw at> wrote:

> On 6 June 2015 at 15:30, Kevin O'Gorman <kogorman at> wrote:
> ...

> > I don't know how to boot into another user or session -- and unless it's
> something grub can do, I'm probably unable because of having no keyboard
> once the kernel starts
> >
> > System is on a LAN, but unavailable.  It normally serves apache, but
> that's not working either, which has me worried.  I would have thought the
> server would be up whether I logged in or not.
> So it is not the keyboard that is not working, it is more serious than
> that.  You have not reported what is in the logs.  There should
> definitely be something significant if the whole machine is stuck.

Well it's definitely not JUST the keyboard that's not working.

Thanks for the reminder about logs.  I'm frazzled and forgetting stuff.
There were two sections that mentioned nVidia:  I don't understand the
first one at all.  The second one has me check /dev/nvidia, but that
directory is entirely missing when I boot in rescue mode.  Since many /dev/
things are created on the fly and I cannot get to a graphical mode while
also having access to a shell, I'm not sure that means much.  But that log
section may be pointing at the problem.

It also mentions /var/run permissions.  /var/run is a symlink to /run,
which is 755 owned by root and has no ACLs.  Could the 55 part be a
problem?  User 119 is nvidia-persistenced, and belongs only to its own

I'll compare some of this to Xubuntu on the laptop I have that also uses
nVidia, and appears to be working.  It's running a later non-LTS release,
but it could shed light.

Jun  5 19:02:41 treat kernel: [    8.685841] [drm] Initialized drm 1.1.0
Jun  5 19:02:41 treat kernel: [    8.692119] nvidia: module license
'NVIDIA' taints kernel.
Jun  5 19:02:41 treat kernel: [    8.692124] Disabling lock debugging due
to kernel taint
Jun  5 19:02:41 treat kernel: [    8.698986] nvidia: module verification
failed: signature and/or  required key missing - tainting kernel
Jun  5 19:02:41 treat kernel: [    8.706126] vgaarb: device changed
decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none
Jun  5 19:02:41 treat kernel: [    8.706384] [drm] Initialized nvidia-drm
0.0.0 20130102 for 0000:01:00.0 on minor 0
Jun  5 19:02:41 treat kernel: [    8.706401] NVRM: loading NVIDIA UNIX
x86_64 Kernel Module  331.113  Mon Dec  1 21:08:13 PST 2014

Jun  5 19:02:51 treat nvidia-persistenced: Started (1418)
Jun  5 19:02:51 treat nvidia-persistenced: Failed to query NVIDIA devices.
Please ensure that the NVIDIA device files (/dev/nvidia*) exist, and that
user 119 has read and write permissions for those files.
Jun  5 19:02:51 treat nvidia-persistenced: The daemon no longer has
permission to remove its runtime data directory /var/run/nvidia-persistenced
Jun  5 19:02:51 treat nvidia-persistenced: Shutdown (1418)
Jun  5 19:02:51 treat kernel: [   19.720096] init: nvidia-persistenced main
process (1418) terminated with status 1

Kevin O'Gorman
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