LinuxQuestions.org
LinuxAnswers - the LQ Linux tutorial section.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - General
User Name
Password
Linux - General This Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.

Notices

View Poll Results: Do you have the Caps Lock issue?
Usb keyboard without Caps Lock issue. 8 38.10%
PS/2 keyboard without Caps Lock issue. 9 42.86%
Laptop keyboard without Caps lock issue. 4 19.05%
Usb keyboard with Caps Lock issue. 3 14.29%
PS/2 keyboard with Caps Lock issue. 1 4.76%
Laptop keyboard with Caps Lock issue. 0 0%
Multiple Choice Poll. Voters: 21. You may not vote on this poll

Reply
 
Search this Thread
Old 08-11-2011, 05:02 PM   #1
whizje
Member
 
Registered: Sep 2008
Location: The Netherlands
Distribution: Slackware64 current
Posts: 583

Rep: Reputation: 129Reputation: 129
Poll: Caps Lock delay


Do you have the Caps Lock issue, that is when you fast intermittent press Caps Lock and another key. When Caps Lock isn't released fast enough you don't get a nice sequence of upper case and lower case.
Example you should get:
Quote:
AaAaAaAaAaAaAaAaAaAaAaAaAaAaA
but with the Caps Lock issue you might get
Quote:
AaAaAaAaAaAAAAAAAAaAAaAaAaAaAAAAAA
 
Old 08-11-2011, 08:05 PM   #2
qlue
Member
 
Registered: Aug 2009
Location: Umzinto, South Africa
Distribution: Crunchbang
Posts: 635
Blog Entries: 1

Rep: Reputation: 140Reputation: 140
Quote:
Originally Posted by whizje View Post
Do you have the Caps Lock issue, that is when you fast intermittent press Caps Lock and another key. When Caps Lock isn't released fast enough you don't get a nice sequence of upper case and lower case.
Example you should get:

but with the Caps Lock issue you might get
I don't understand! Caps lock is a toggle between two input modes. It is meant to be pressed and released before any other key is pressed.
 
Old 08-11-2011, 09:57 PM   #3
crts
Senior Member
 
Registered: Jan 2010
Posts: 1,604

Rep: Reputation: 446Reputation: 446Reputation: 446Reputation: 446Reputation: 446
Quote:
Originally Posted by qlue View Post
I don't understand! Caps lock is a toggle between two input modes. It is meant to be pressed and released before any other key is pressed.
Hi,

read this thread first to get an idea what is meant.

@OP: It might be a good idea to link to the above thread in your initial post so that the whole discussion does not have to be repeated.
 
Old 08-11-2011, 10:34 PM   #4
frankbell
Guru
 
Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Mageia, Mint
Posts: 8,087

Rep: Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533Reputation: 1533
This whole caps lock thing has nothing to do with the keyboard. It is PEBCAK.
 
1 members found this post helpful.
Old 08-12-2011, 01:03 AM   #5
qlue
Member
 
Registered: Aug 2009
Location: Umzinto, South Africa
Distribution: Crunchbang
Posts: 635
Blog Entries: 1

Rep: Reputation: 140Reputation: 140
Quote:
Originally Posted by frankbell View Post
This whole caps lock thing has nothing to do with the keyboard. It is PEBCAK.
+1
There is no problem if you use the right key for the right job! Use the 'Shift' key!
 
Old 08-12-2011, 03:01 PM   #6
whizje
Member
 
Registered: Sep 2008
Location: The Netherlands
Distribution: Slackware64 current
Posts: 583

Original Poster
Rep: Reputation: 129Reputation: 129
I agree that it's better to use shift for one letter, but the issue is that there should not be such a long delay between when you release caps lock and press fast the next key that you get upper case instead of lower case. Doesn't really matter if you type a whole line in upper case or one letter. It should just work.
 
Old 08-14-2011, 11:53 AM   #7
DavidMcCann
Senior Member
 
Registered: Jul 2006
Location: London
Distribution: CentOS, Salix
Posts: 3,185

Rep: Reputation: 812Reputation: 812Reputation: 812Reputation: 812Reputation: 812Reputation: 812Reputation: 812
I think that complaining that your computer doesn't support something that was it was never intended to do in the first place is a waste of time! That said, I wonder if it's more likely to be caused by hardware than by the OS, since only 1 person out of 9 has had the experience.
 
1 members found this post helpful.
Old 08-14-2011, 06:55 PM   #8
almatic
Member
 
Registered: Mar 2007
Distribution: Debian
Posts: 547

Rep: Reputation: 67
Definitely no issue here, no matter how fast I try.
 
Old 08-16-2011, 08:54 AM   #9
cmcanulty
LQ Newbie
 
Registered: Sep 2009
Posts: 26

Rep: Reputation: 0
Caps Lock

I turn the blasted thing off & make it an additional backspace in Keyboard-Layouts-Options in Ubuntu
 
Old 08-16-2011, 10:48 AM   #10
GazL
Senior Member
 
Registered: May 2008
Posts: 3,475

Rep: Reputation: 1014Reputation: 1014Reputation: 1014Reputation: 1014Reputation: 1014Reputation: 1014Reputation: 1014Reputation: 1014
I can duplicate the effect, but I believe it is mechanical.

What I've noticed is that when I get the unexpected upper-case characters in the sequence, an examination of their Xevents show that the KeyPress event for that character comes between the caps_lock's KeyPress and KeyRelease events.

Normal character input is actioned on the keypress, The caps_locks effect appears to turn on on it's KeyPress event, but only turns off on its KeyRelease. While the caps_lock key remains depressed you always get a upper-case letter no matter what state it was in before the keypress or will be in after the keyRelease.

This may be the cause of the perceived latency as the key release event's timing will depend on the strength of the mechanical spring in the keyboard and how much travel is necessary to break the contact, not to mention you're probably slower at removing your finger than you were at applying it. For exceptionally fast typists, this may be long enough to cover the following KeyPress.

Well, that's my theory for what it's worth.


Changing the caps_lock off to action on keyPress rather than KeyRelease would probably fix this, but I don't know how one would go about doing that.


I can't type fast enough to see this problem in normal use, and I never use caps-lock anyway (well, never on purpose )

Last edited by GazL; 08-16-2011 at 10:55 AM.
 
Old 09-03-2011, 11:18 AM   #11
Jack Waugh
LQ Newbie
 
Registered: Dec 2010
Distribution: Ubuntu
Posts: 3

Rep: Reputation: 0
Mine behaves as though there's no "N-key rollover" for the caps lock followed by "A".
 
Old 09-05-2011, 08:40 AM   #12
Bruce Hill
HCL Maintainer
 
Registered: Jun 2003
Location: Tupelo, MS
Distribution: Gentoo
Posts: 6,926

Rep: Reputation: 124Reputation: 124
Quote:
Originally Posted by frankbell View Post
This whole caps lock thing has nothing to do with the keyboard. It is PEBCAK.
For the record it's PEBKAC - or PICNIC
 
Old 09-05-2011, 09:16 AM   #13
onebuck
Moderator
 
Registered: Jan 2005
Location: Midwest USA, Central Illinois
Distribution: SlackwareŽ
Posts: 11,380
Blog Entries: 3

Rep: Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478Reputation: 1478
Hi,

For mechanical keyboards I will throw in the de-bounce circuitry that will filter errant contact bounce. Capacitive keyboards really do not have the contact bounce issue. Most modern keyboards in use today do not use a mechanical switch contact, cheaper to manufacture capacitive. Hall-effect at one time was the best choice for keyboards but costly.

Some snap contact(membrane) keyboards are used but these tend to be limited to special applications.

Keyboard technology wiki is a good reference to understand the technologies.

Personal choice is limited to available designs unless you wish to spend the money for a particular keyboard type. I still have some original IBM mechanical keyboards, those babies are rock solid with a great key feel or feedback. Heavy but reliable! When IBM changed the contact to a hall-effect type they had too re-design to get the mechanical feel back so people had the old feel. Now most PC keyboards are capacitive. No real tactical feel.
 
Old 09-16-2011, 12:55 PM   #14
laughlin_kay
LQ Newbie
 
Registered: Mar 2011
Distribution: Fedora
Posts: 5

Rep: Reputation: 0
hmmm......
i see
it doesn't bring too much problem since i rarely use caps lock button
 
0 members found this post helpful.
Old 09-16-2011, 01:55 PM   #15
ksbalaji
LQ Newbie
 
Registered: Jul 2010
Location: Chennai, India
Distribution: Ubuntu Hardy
Posts: 3

Rep: Reputation: 0
AaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAa

Is there any issue at all?
 
0 members found this post helpful.
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Num lock OFF and Caps & Screen Lock ON at Linux startup. Reversing? peteyperson Linux - Newbie 2 02-28-2009 12:44 PM
all software installs hang scroll lock and caps lock lights flash jcorrnt Linux - Hardware 6 02-07-2009 01:44 PM
Hard lock plus Caps and Scroll Lock flashing (kernel panic?) TiredOfThis Linux - General 4 12-11-2007 08:35 PM
Caps Lock and Num Lock leds dont work! npc Linux - Hardware 2 11-08-2005 11:40 AM
RedHat 9.0 freezes with blinking Caps lock and Scroll lock queen-bee Linux - Software 0 07-30-2004 11:40 PM


All times are GMT -5. The time now is 03:22 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration