Databases
StackOverflow2013
Postsdbo
POLinux single key presses triggering multiple-key combinations
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POLinux single key presses triggering multiple-key combinations
    primarykey
    data
    text
    <p>I understand that new keyboards can be ordered online, but now that this problem has proven to be hard I am completely fascinated by it.</p> <p>Many old laptop keyboards as they wear develop consistent shorts which cause multiple keys to react when a single key is pressed. For example, on my little sister's computer if you press "r" the system outputs "vr", "i" outputs ",i" and so-on.</p> <p>Assuming the user is not a vim/emacs power user, the keyboard still seems salvageable. It seems that if the keyboard driver was changed so that pressing the "r" key resulted in the computer accepting "backspace r" the "v" would disappear and not be such a hassle anymore.</p> <p>Xmodmap XKB and other systems seem to assume that each single key depression will result in a single command. Does anybody understand the missing link where more than one character can come from a single keypress? There seem to be many places in the stack where this can be pulled off, but none of them are particularly clearly documented. Another fun fact is that you can't force this in the ubuntu keyboard shortcuts editor, ubuntu will stop you from entering the changes there under the premise that "this will make it impossible to type."</p> <p>Hacking around in xev shows that the computer believes that when you hit and release 'r' that it gets a keypress event for 'v' then a keypress event for 'r' then a keyrelease event for 'v' then one for 'r'. If you could change the configuration to ignore a first keypress if there is no corresponding key release before the next key is pressed, that would work too.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USKaty Levinson
    1. USKaty Levinson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. POLinux single key presses triggering multiple-key combinations
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POLinux single key presses triggering multiple-key combinations
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI would do that in the X server (The kernel should not be responsible for hacks like these). Writing drivers is simple nowadays. But i suspect that it won't helps much in your case. Maybe you should start writing a X Client to test your theories.
      singulars
      1. POLinux single key presses triggering multiple-key combinations
      1. USBatchyX
    2. COHacks like this shouldn't be in the kernel, but if I get it in low enough in the system I can make stuff like vim usable again. Even if it isn't the "right" place I am looking for the easiest place.
      singulars
      1. POLinux single key presses triggering multiple-key combinations
      1. USKaty Levinson
    3. COAre you certain that the keyboard's behavior is still unambiguous? For instance, if `r` generates `vr`, does `v` generate something distinct from that?
      singulars
      1. POLinux single key presses triggering multiple-key combinations
      1. USduskwuff
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload