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Top Forums UNIX for Dummies Questions & Answers Strange Keyboard and Mouse Issue Post 302930825 by mrm5102 on Wednesday 7th of January 2015 02:21:00 PM
Old 01-07-2015
Strange Keyboard and Mouse Issue

Hello All,

PC: CuBox-i (*i.MX6) Mini-PC
OS: openSUSE 13.1 (Bottle) (armv7hl)
Kernel: 3.14.14-cubox-i

Code:
# uname -a
Linux CuBox-HQ 3.14.14-cubox-i #1 SMP Sat Sep 13 03:48:24 UTC 2014 armv7l armv7l armv7l GNU/Linux

So I've been having this random issue happen on this PC where a few strange things start happening with the Mouse and Keyboard.

1st Issue:
When the issue is occuring, the mouse pointer will randomly click things on the screen. However, the mouse does NOT
move around on it's own, it's more or less just clicking stuff. So for example lets say I have a terminal open and I start to
move the mouse across the terminal window, the mouse will suddenly highlight a few lines that I just moved past as if I
held down the left mouse button to highlight them. Or, if I'm moving my mouse pointer over a window that is not in
"focus" (*i.e. not the top window on screen) it will click that window making it the new top window on the screen.

2nd Issue:
This one is similar to the one above in that occasionally when I first touch the mouse to start moving the pointer, it will suddenly
right-click wherever the mouse was when I first began to move it.

3rd Issue:
This problem has to do with the keyboard... While I'm typing not every key I press gets put onto the screen. For example, while I'm
typing NOT every key I press is being shown on the screen as I press the key. So let's say I'm typing the "The Quick brown fox jumped
over the lazy dog."
phrase, I'll be more likely to get something like this: "he ickbrown fop jmped over the lay do"
As you can see lots of letters and spaces are missing.

4th Issue:
This one is also similar to the previous one (*3rd Issue), but instead of missing/skipping keys, as I'm pressing keys on the keyboard
it will suddenly start repeating whatever character I just hit. For example, let's say I'm trying to use the up and down arrows in a
terminal to cycle through the command history, it will suddenly begin scrolling through the commands extremely fast, as if I was
holding down the down-arrow key, and will continue doing this until I hit another key. Also, another example would be if I was writing
the same phrase from the previous example, I would get something like this:
"Te qucccck bron fffffffffffffox jud oer the lzyyy dg......................"

*FYI, all the example text strings above where copy/pasted from that PC, so that is actually what was printed...

So basically when all these issues I described above start happening, they all happen at the same time, seemingly randomly. Usually I
can just reboot the PC and the issue goes away. But I just now tried a reboot and it was still happening after it came back up...

I also thought that this only started happening when the CPU was under a heavy load, but today when it happened the ONLY thing I had
open at that moment was one terminal window. Just an FYI, this issue would continue no matter what program is up on the screen, it
does not only happen with terminals.

Does anybody have any idea what could be causing this problem, it's REALLY frustrating and basically unusable when it starts happening.
Any thoughts or suggestions would be greatly appreciated.

Thanks in Advance,
Matt
 

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ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME
ppmtosixel - convert a portable pixmap into DEC sixel format SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC LJ250 color inkjet printer. If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file. OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com- pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni- tude larger than a compressed file and prints much slower. -margin If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci- fied, a 1.5 inch left margin will offset the image. PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?. BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation. SEE ALSO
ppm(5) AUTHOR
Copyright (C) 1991 by Rick Vinci. 26 April 1991 ppmtosixel(1)
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