Ubuntu 18.04: Backslash key incorrectly mapped in ANSI keyboard (English US)

Question

I have this exact keyboard, with US ANSI layout:

I have just installed Ubuntu 18.04. In Region & Language, Language is defined as English (United States), Formats is United States (English), and the Input Sources is English (US).

All keys seem to map correctly except for the BACKSLASH KEY (\ and |). When I click on the backslash key, it maps to the </> (highlighted in red in the photo below) instead of the actual backslash key (highlighted in green).

See the photo I just took to see what happens... I have no way of typing \ and | (in fact I had to copy them from internet to ask this question), which is an absolute disaster.

How can I solve this??

EDIT:

Running xev and pressing the backslash key returns this:

KeyPress event, serial 37, synthetic NO, window 0x2400001,
    root 0x190, subw 0x0, time 104965, (16,-13), root:(113,89),
    state 0x0, keycode 94 (keysym 0x3c, less), same_screen YES,
    XLookupString gives 1 bytes: (3c) "<"
    XmbLookupString gives 1 bytes: (3c) "<"
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x2400001,
    root 0x190, subw 0x0, time 105084, (16,-13), root:(113,89),
    state 0x0, keycode 94 (keysym 0x3c, less), same_screen YES,
    XLookupString gives 1 bytes: (3c) "<"
    XFilterEvent returns: False

The normal slash key is correctly mapped:

KeyPress event, serial 37, synthetic NO, window 0x3600001,
    root 0x190, subw 0x0, time 278763, (270,441), root:(367,543),
    state 0x0, keycode 61 (keysym 0x2f, slash), same_screen YES,
    XLookupString gives 1 bytes: (2f) "/"
    XmbLookupString gives 1 bytes: (2f) "/"
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x3600001,
    root 0x190, subw 0x0, time 278864, (270,441), root:(367,543),
    state 0x0, keycode 61 (keysym 0x2f, slash), same_screen YES,
    XLookupString gives 1 bytes: (2f) "/"
    XFilterEvent returns: False

Apparently my laptop is missing a patch that should have come installed from factory... The company sent the patch in a zip file, but I am not completely sure how to install it, supposedly I should make a bootable usb with the patch, anybody knows how? — DaniCee, Dec 23 '18 at 16:40
xmodmap -e "keycode 94 = backslash" gives me a blank output, literally nothing, I get the prompt on the next line. They did give me a small tutorial, but when I follow the steps and try to boot from the usb with the patch, I get This is not a bootable disk. Please insert a bootable floppy and press any key to try again... — DaniCee, Dec 24 '18 at 01:18
Yes, after running the xmodmap command, it types \, but not |, and this is not mantained after reboot. This is the file that they shared with me with the patch: https://slimbook.es/images/descargas/Cedilla_FIX.zip The tutorial is in Spanish, but automatic translation might still make sense: https://slimbook.es/tutoriales/slimbook/274-parche-intel-me-s-000086-para-slimbook-excalibur2 Let me know if you have access — DaniCee, Dec 24 '18 at 04:20
The tutorial is just: 1- Install UNetbootin 2- Format USB in FAT32 3- Open UNetbootin and choose FreeDOS version 1.0 and Accept 4- Copy the uncompressed Cedilla patch files into the USB root 5- Disable Secure Boot and boot from the USB (I get the error here).... — DaniCee, Dec 24 '18 at 04:24

PRATAP · Accepted Answer · 2018-12-24T07:12:01.240

1

extract the .zip file provided by supplier.

bring out the sub-folder from Cedilla_FIX and rename it as PAT

make sure this PAT folder will contain below files.

now install unetbootin with below commands if not yet installed.

sudo add-apt-repository ppa:gezakovacs/ppa
sudo apt-get update
sudo apt-get install unetbootin

now we have required folder PAT & unetbootin software to make the USB bootable.

insert the empty USB that we are going to make bootable.
format the USB to FAT32 type.
open unetbootin sudo unetbootin
select FreeDOS beside the text Distribution and proceed with OK.

now the USB became bootable, we need to paste the PAT folder in it.

now reboot the system and get into boot menu.

edited Dec 24 '18 at 07:12

answered Dec 24 '18 at 06:59

PRATAP

22,460

Hi I am trying this only now... I still see the message "This is not a bootable disk. Please insert a bootable floppy and press any key to try again". I notice that when unetbooting completes successfully, I do not have all the files you have in my usb stick... I miss the files ldlinux.c32 and ldlinux.sys – DaniCee Jan 11 '19 at 02:43
OK I created the bootable stick in a Mac this time (instead of in Ubuntu as I was doing). I still do not have your files ldlinux.c32, libcom32.c32, and libutil.c32, but I do have ldlinux.sys, and this time the usb boots! – DaniCee Jan 11 '19 at 03:10
The keys work properly now it seems, but the laptop froze when I rebooted... Let me update you in a bit – DaniCee Jan 11 '19 at 03:11
When I create it with Mac, it boots, when I create it with Ubuntu it doesn't... I thought you had used Mac to create it looking at the screenshots – DaniCee Jan 11 '19 at 03:14
In Ubuntu, I actually had to run it with sudo QT_X11_NO_MITSHM=1 unetbootin (https://askubuntu.com/questions/776611/unetbootin-has-no-gui-on-ubuntu-gnome), maybe it has something to do with it... but it didn't give me no error or anything, it just didn't boot afterwards – DaniCee Jan 11 '19 at 03:20
Then I really have no clue why in my case the usb stick didn't boot and I got the message This is not a bootable disk. Please insert a bootable floppy and press any key to try again – DaniCee Jan 11 '19 at 03:24
Oh well either way the key seems to be working properly now, I will focus on working on the other problems with my laptop XD – DaniCee Jan 11 '19 at 03:33

Ubuntu 18.04: Backslash key incorrectly mapped in ANSI keyboard (English US)

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