Skip to main content

不能启用触摸板的临时办法 | A workaround of enabling touchpad

症状是 touchpad 可以识别,按笔记本上的启用/禁止触摸板键,屏幕上也有正确提示,但是触摸板就是不能工作。
一个可能的原因就是在windows里面禁用了,重启进ubuntu以后就出这个问题。
另外发现在禁用的情况下,按住笔记本上那个键(我这里是Fn+F7)就可以用,松开就不行。

在网上搜到的gconf的键值,观察了一下,只有按住的时候是enabled,否则是disabled了。

临时解决方案是:

gconftool-2 -t bool -s /desktop/gnome/peripherals/touchpad/touchpad_enabled "True"

运行以后笔记本上的启用/禁止键也能正常工作了。

这个估计是Xorg或者GNOME的bug。




The symptom is that although my touchpad is recognized, and when I press the enable/disable key on my keyboard, there's right notification on the screen, but my touchpad just is not working.

One possible reason is that I've disabled it in Windows, then I restarted my machine and entered Ubuntu.

Another thing I found is that only when holding the enable/disable key can I use the touchpad.

I found the corresponding key in gconf, and indeed I observed that the key is enabled only when the enable/disable key is being held.

A workaround is to run the following command.

gconftool-2 -t bool -s /desktop/gnome/peripherals/touchpad/touchpad_enabled "True"

After that the enable/disable key works well.

This must be a bug in Xorg or GNOME.

Comments

Popular posts from this blog

Determine Perspective Lines With Off-page Vanishing Point

In perspective drawing, a vanishing point represents a group of parallel lines, in other words, a direction. For any point on the paper, if we want a line towards the same direction (in the 3d space), we simply draw a line through it and the vanishing point. But sometimes the vanishing point is too far away, such that it is outside the paper/canvas. In this example, we have a point P and two perspective lines L1 and L2. The vanishing point VP is naturally the intersection of L1 and L2. The task is to draw a line through P and VP, without having VP on the paper. I am aware of a few traditional solutions: 1. Use extra pieces of paper such that we can extend L1 and L2 until we see VP. 2. Draw everything in a smaller scale, such that we can see both P and VP on the paper. Draw the line and scale everything back. 3. Draw a perspective grid using the Brewer Method. #1 and #2 might be quite practical. #3 may not guarantee a solution, unless we can measure distances/p...

Hardware Password Manager

[Updates 2025-01-20] The original blog post assumes that all passwords are stored in one password manager, and the password manager either unlocks everything or nothing (e.g. Keepass). After discussing with friends, I realized that if I use something like pass , and I use a hardware GPG token, I can actually store and sync all encrypted passwords to all devices, because I will only decrypt the passwords on demand, and the computer will not see the GPG private key. The compromise is that the computer will see the list of all password entries (e.g. accounts), as well as a few other issues . I've been using Keepass for many years. I don't use online password services because I cannot fully trust them. Besides, I may not always have Internet connection, which is why I also don't use a self-hosted service. Everything has been working fine, until I turn my paranoid knob to the max. Here's the thought experiment . The Imaginary Scenario Let's say I have 100 PCs for differe...

Installing Linux on Surface Pro 1g

Windows 10 will soon reach its end of life, and my 1-gen Surface Pro is not supported by Windows 11. I (finally) decided to install Linux to it. Fortunately, it's a not-so-easy nice adventure: The device has only one USB port, so I have to bring back my 10+-year old USB hub. My live USB drive cannot boot directly, I have to disable Secure Boot first, by holding Volume Up during boot. I think years ago I learned that booting on USB might not work through a USB hub, but fortunatelly it worked well with my setup. This is done by holding Volume Down during boot. Wifi adapter was detected in the live Linux environment, but not functional. And I don't have a USB-Ethernet adapter. Luckily, nowadays we have USB-tethering from Android phones, which works out-of-the-box. Originally I planned to following this guide to set up root on ZFS, however, the system froze when building the ZFS kernel module. Then I decided to just use EXT4, yet I still learned a lot from the guide about disk par...