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Japanese かな input

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I am using a normal Japanese keyboard on a laptop without ten keys. I installed ubuntu, the English(US) mode, at first. And I installed the japanese lang pack afterwards. I am now switching from Romaji input to kana input mode. And I noticed that some keys behave weirdly. In the following the first letter is the key I pressed and the second is letter appeared on my pc screen, the third the letter appeared with shift key also pressed.

The first row
お おを (e.g. を = shift + お)
や やぉ
ゆ ゆけ
よ よゅ
わ わょ
ほ ほろ
へ ほれ (e.g. ほ appears when pressed へ)  
Yen Mark nothing

The second row
upperdoubledots  ゜「
uppercircle  む」

The third row
れ れけ
け やふ

The fourth row
む ろー
ろ nothing
in flag
Are you using ibus or mozc? I’ve been using Japanese ThinkPads for 10+ years and not seen this issue. What sort of notebook are you using?
Taro avatar
by flag
It's mozc and mine is inspiron.
Sadaharu Wakisaka avatar
pl flag
Is this permanent or temporary? If so, could you provide a complete keymap of yours? Type every key from left to right and with left shift key down, right shift key down. I know some people try to develop a new keymap for fast/comfortable-typing, perhaps related and anything match with this one, perhaps wrong wired.
Taro avatar
by flag
@SadaharuWakisaka I think it is a <a href="https://www.amazon.co.jp/-/en/Replacement-Japanese-Keyboard-Inspiron-11-%E2%80%93-3000-3147-3148/dp/B01N5MJI8B">normal one</a>. It seems like a permanent issue with my かなinput, it persists after reboots
Taro avatar
by flag
I'd like to provide a complete set of the key mapping. Is there a convenient command to produce it?
Sadaharu Wakisaka avatar
pl flag
I have had a wrong keyboard for a laptop sent from Amazon or eBay several times, you-know-where, they don't think the wiring matters, they only send something looks like it. To make a keymap, you can type all of them, if you let a program to do it, it cannot be the same. *Now* you don't have to do it, we knew what was wrong with your keyboard.
Score:0
pl flag

Laptop keyboards act like PS/2, they have direct accesses to the mainboard.
While you press keys as much of you want until all the keys are pressed. While a USB keyboard only sends 6 of them at one time.

enter image description here

See: https://superuser.com/questions/456459/computer-architecture-are-usb-keyboards-less-responsive-due-to-narrow-irq-range

Taro avatar
by flag
Thank you sir, but what can I do to mend this problem?
Sadaharu Wakisaka avatar
pl flag
You are welcome. If I were you, refund that JP keyboard and put the original back to laptop, because anything can go wrong with a broken parts. You can buy a used USB keyboard (ask your friend, he will give you one). FYI, I only have used Kana input with the first word processor 30 years ago, that machine didn't allow me Roman input. I found Kana input ridiculous while writing a high school drama script. Later 親指シフト was introduced for a professional typist, I didn't find the efficiency, either. Realforce or HHKB does a better job, stick to QWERTY the universal layout.
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