Jtdcftul

So, I am changing the scroll speed in Ubuntu using this answer:

Change mouse wheel scroll speed in Chrome on 12.04 (edit starter bar commandline)

Exec=/opt/google/chrome/google-chrome --scroll-pixels=150 %U

It works, but every time Chrome updates I need to do it again, is there any way I can permanently fix this issue?

Here is a solution which works perfectly:

sudo apt update

sudo apt install imwheel

gedit ~/.imwheelrc

Copy and paste the following into the newly-created .imwheelrc file (that you just made in your home directory via the gedit command above):

".*-chrome*"

None,      Up,   Button4, 3

None,      Down, Button5, 3

Control_L, Up,   Control_L|Button4

Control_L, Down, Control_L|Button5

Shift_L,   Up,   Shift_L|Button4

Shift_L,   Down, Shift_L|Button5

3 is the "scroll speed multiplier." Use a larger number for faster scrolling, or a smaller number for slower scrolling. The ".*-chrome*" part says to apply these scroll wheel speed increase changes ONLY to chrome.

Run imwheel -b "4 5" to test your settings. When done testing, run killall imwheel to kill it, then make your edits to .imwheelrc, as desired, and run imwheel -b "4 5" again for more testing. Be sure to fully close and re-open Chrome each time you restart imwheel too, to ensure its new settings take effect. This must be done by right-clicking the little Chrome icon in the top-right of your desktop pane and going to "Exit".

Also keep in mind that if you are using a cheap mouse, your scroll wheel decoder may be lousy and miss encoder counts when moving the wheel fast. Therefore, in such a case, move the wheel at a reduced speed when testing the effect of imwheel, so that your mouse doesn't miss encoder counts on the scroll wheel, making you think imwheel isn't working right when it's really just your cheap hardware's problem.

Add imwheel -b "4 5" to Ubuntu's "Startup Applications" to get it to run every time the computer starts.

As Steven C. Howell says here:

Note that using the option -b "4 5" restricts imwheel to only affect the scroll wheel, discussed here.

Another answer by "tvn" here: https://askubuntu.com/a/304653/327339.

More answers here: Increase mouse wheel scroll speed.

Reference notes:

I am not the original author of the answers linked-to above, rather, user "tvn" and others are, although tvn's answer is lacking in that it replaces mouse scroll wheel movements with multiple arrow-key Arrow Up and Arrow Down key presses, which means you have to click in a window for it to take effect, and some things like the browser-based Jupyter Notebook Python programming environment scroll horribly like this! Therefore, Steven C. Howell gave an improved answer which keeps the scroll wheel mapping to the scroll wheel, instead of to keyboard up and down keys, but his answer is lacking in that it applies this new scroll wheel scaling to everything on your computer, so I just modified this answer 27 Aug. 2018 to reflect Steven Howell's answer, but with the addition of adding ".*-chrome*" to the top of the ~/.imwheelrc file so that these new scroll setting apply only to your Chrome browser, which is really what I want. Note also, I have made several significant and important edits and contributions to tvn's answer linked to above, but now I think this answer here is much better, and it's deviated too much from tvn's answer to even attempt to edit his answer further.

Tested in Ubuntu 14.04 LTS.

Update 3 Mar. 2019: tested in Ubuntu 18.04 LTS as well, and it seems the effect takes place immediately in Chrome now each time you run killall imwheel and then imwheel -b "4 5" to test new settings.

unfortunately this function is deprecated and removed from Chrome and Chromium. It is not working anymore with the latest versions of Chrome.

https://code.google.com/p/chromium/issues/detail?id=154776

But you can use this quite cool plugin to speed up your scroll speed in Chrome on Linux.

https://chrome.google.com/webstore/detail/chromium-wheel-smooth-scr/khpcanbeojalbkpgpmjpdkjnkfcgfkhb

Try this alternative https://chrome.google.com/webstore/detail/gestures-for-google-chrom/jpkfjicglakibpenojifdiepckckakgk?utm_source=chrome-app-launcher-info-dialog. It has better performance than Chromium Wheel Smooth Scroller