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#1 2016-07-22 06:36:33

johnraff
nullglob
From: Nagoya, Japan
Registered: 2015-09-09
Posts: 8,025
Website

Keyboard dies occasionally.

Every so often - about once a week - the keyboard suddenly stops responding. It might be triggered by a spell of intense activity - a lot of clicking and tapping in a short time - but is pretty much random.

Everything else continues as normal, including the mouse. I can close windows and do anything else for which there is a point-and-click GUI, but nothing involving typing. Ctrl+Alt+F2 is ignored too so I can't test a different tty.

Logout doesn't help - the only thing which works is a reboot, which always fixes it.

It sounds like a hardware issue, but I don't think the reboot would fix it so reliably if it was just a loose wire. Some BIOS problem?

If there was some command which would help diagnose this I could make a point-and-click launcher to run it next time the keyboard dies.

Any advice appreciated! smile


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#2 2016-07-22 07:24:43

Head_on_a_Stick
Member
From: London
Registered: 2015-09-29
Posts: 8,759
Website

Re: Keyboard dies occasionally.

Is there anything in the systemd journal?

https://www.digitalocean.com/community/ … stemd-logs

Either run `journalctl` as root or add your user to the systemd-journal group to view the full content of the logs:

sudo gpasswd -a $USER systemd-journal && newgrp systemd-journal

You will also have to edit /etc/systemd/journald.conf and uncomment & change this line:

Storage=persistent

See journald.conf(5)


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#3 2016-07-22 23:33:57

Horizon_Brave
Operating System: Linux-Nettrix
Registered: 2015-10-18
Posts: 1,473

Re: Keyboard dies occasionally.

Also, after the keyboard looses "connectivity" would doing a dmesg  should any current kernel events? Or would that just show on boot info?

The only thing I can think of...is if you have a really crazy keyboard with volume knobs, and different function buttons, maybe it's a driver issue? Perhaps one of the drivers that are required to use one of the functions that isn't supported on deb/bun?


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#4 2016-07-23 02:42:19

johnraff
nullglob
From: Nagoya, Japan
Registered: 2015-09-09
Posts: 8,025
Website

Re: Keyboard dies occasionally.

@HoaS thanks I'll look into those and report back. This is very intermittent so might turn out to be a long-term investigation...

@HB Running "dmsg" or any other command is not possible without a keyboard... unless I make a mouse-clickable launcher that does 'urxvt -hold -e dmesg'. I might set that up just to see. Wait - I already have a "live system messages" menu item that does 'urxvt -e sudo tail -f /var/log/messages' but it needs a password typed in (impossible of course) so some sort of exemption would have to be set up.

It's a very vanilla keyboard with nothing special and has worked fine up till recently. Maybe it's just the heat getting to the hardware?


...elevator in the Brain Hotel, broken down but just as well...
( a boring Japan blog (currently paused), idle Twitterings and GitStuff )

Introduction to the Bunsenlabs Lithium Desktop

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#5 2016-10-26 08:08:56

johnraff
nullglob
From: Nagoya, Japan
Registered: 2015-09-09
Posts: 8,025
Website

Re: Keyboard dies occasionally.

I put this on hold because it was behaving OK for a while, but had more today (mouse died too this time). Trying to use journalctl hasn't been working out, so I started a new support request: https://forums.bunsenlabs.org/viewtopic … 340#p39340

Now I've got two problems... neutral


...elevator in the Brain Hotel, broken down but just as well...
( a boring Japan blog (currently paused), idle Twitterings and GitStuff )

Introduction to the Bunsenlabs Lithium Desktop

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#6 2017-01-06 07:31:50

johnraff
nullglob
From: Nagoya, Japan
Registered: 2015-09-09
Posts: 8,025
Website

Re: Keyboard dies occasionally.

Well, eventually got to read journal entries, to find nothing particularly suspicious - just one reference to a partition failing to mount, which did not recur.

Next thought was that it might be getting too hot, so opened up the case to clear out the dust - there wasn't so much.

Then ran a memtest - had to search around but found an old Ubuntu CD with memtest86+ 4.20 and indeed got a whole slew of errors at the "Random number sequence" stage. OK now we're on to something - next was to take out each of the memory sticks (2G each) in turn to see which was the bad one. Both of them gave the same errors. A bit of Googling revealed that it was a bug in memtest86+ 4.20. bored.gif

So I put the memory cards back in - in reversed positions, and taking special care that they were properly plugged in. Since then there's been no trouble, so maybe it was just a dirty connection to one of the RAM cards.

Fingers crossed...


...elevator in the Brain Hotel, broken down but just as well...
( a boring Japan blog (currently paused), idle Twitterings and GitStuff )

Introduction to the Bunsenlabs Lithium Desktop

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