Following operation only takes effect in Xorg. If you are in Wayland, you need to log out and switch to a Xorg session.

First, you need to find out device ID of your touchpad:

$ xinput list

This command will give you something like :
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ SYNA7813:00 06CB:16DB id=13 [slave pointer (2)]
⎜ ↳ ETPS/2 Elantech Touchpad id=15 [slave pointer (2)]
⎜ ↳ dougav’s mouse id=9 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Clavier de Dawud W Vong id=10 [slave keyboard (3)]
↳ HP Wide Vision HD id=11 [slave keyboard (3)]
↳ Intel Virtual Button driver id=12 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
↳ HP WMI hotkeys id=16 [slave keyboard (3)]
↳ HP Wireless hotkeys id=17 [slave keyboard (3)]

Touchpad’s ID is 15 in this case
You can list Properties of your TOuchpad with:
$ xinput --list-props 15
you’ll see something like:
Device 'ETPS/2 Elantech Touchpad':
Device Enabled (143): 1
Coordinate Transformation Matrix (145): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Tapping Enabled (296): 1
libinput Tapping Enabled Default (297): 0
libinput Tapping Drag Enabled (298): 1
libinput Tapping Drag Enabled Default (299): 1
libinput Tapping Drag Lock Enabled (300): 0
libinput Tapping Drag Lock Enabled Default (301): 0
libinput Tapping Button Mapping Enabled (302): 1, 0
libinput Tapping Button Mapping Default (303): 1, 0
libinput Natural Scrolling Enabled (278): 1
libinput Natural Scrolling Enabled Default (279): 0
......

Property “libinput Tapping Drag Lock Enabled” which should be 0 by default is what we need to turn on.
Execute:

$ xinput set-prop 12 "libinput Tapping Drag Lock Enabled" 1
This will enable Drag lock function.
Now you will be able to continuously drag contents without being restricted by touchpad size.
When your dragging movement reaches the edge of the touchpad, you can quickly lift your finger and click-hold the middle of the touchpad without losing your connection with the dragged content.
Please add this command to .xprofile to make it permanently available.

Error message “VBoxClient: the VirtualBox kernel service is not running” appears every time on system startup.
This message disappeared after I uninstalled virtualbox-guest-utils since this is a host, not a guest.

Can’t type Chinese characters in IntelliJ IDEA
Solution: start ibus-daemon with this command:
ibus-daemon -d -x

LXQT’s default panel does not contain a ram monitor and besides, I don’t like its CPU monitor. So I installed Multiload-ng. This widget has fancy colors, and some problem happened to it.
LXQT’s World clock which is located behind Multiload-ng changes its width frequently according to the numbers. This causes instability to Multiload-ng’s color, some color noise appears around Multiload-ng.
According to World clock’s GitHub discussion, the number displayed is controlled by HTML syntax. Therefore, it is easy to set a monospaced font to the clock number like this:


'<font size="3" face="Monospace">'HH:mm:ss'</font>'

This solved Multiload-ng’s color problem.

With some certain files, my LibreOffice impress crashes every time when I click the show button. I started LibreOffice in the terminal in order to catch some error message. I got the following report:

soffice.bin: cairo-ft-font.c:576: _cairo_ft_unscaled_font_create_internal: Assertion `unscaled->base.hash_entry.hash == key.base.hash_entry.hash' failed.

It seems that it has something to do with fonts. I did some tests and found that it is the Chinese font “黑体” from MS powerpoint that caused the crash. The solution is to copy windows’ fonts to LO’s config directory.

specifically:

1. create a new folder ” fonts ” under .config/libreoffice/4/user
2. copy all files from C:\Windows\Fonts to .config/libreoffice/4/user/fonts

Resized EFI partition today, and failed to enter windows. I got this error message:

the boot configuration data for your pc is missing or contains errors

I tried several methods to repair it but none of them helps. Then I realized that the EFI partition may be corrupted.
So, I deleted the EFI partition completely and regenerated one with the tutorial here by genet.
The steps are as follows:

first, make sure you have an unallocated space for EFI and allocate other unused space.
Boot with a windows installation media and enter the command prompt
run the following commands to create EFI partition:

diskpart
list disk #note the disk number where you are going to create EFI
select disk n # n is the number you got from the previous command
list partition #you can see that there is no efi partition yet
create partition efi
format quick fs=fat32
list partition #you can see your new efi partition now
list volume #note the volume letter where your windows is installed
exit

Now, run the following commands to generate boot datas to EFI partition:

bcdboot X:\windows # n is the letter you got from the previous command

Reboot the computer now and you should be able to enter your windows