我的显示器有这个奇怪的问题。我该如何解决？

Looking at this part of your question: P4M890 [S3 UniChrome Pro] I noticed you had a video card that is in the group of the OpenChrome drivers. There is some good news and bad news. The Bad news is that it has many graphic related issues. you can see several of them (Most for the 3D graphics part) here: https://help.ubuntu.com/community/OpenChrome

The good news are the following:

On the same link provided above: https://help.ubuntu.com/community/OpenChrome you can see that there is a compiling from source workaround that "probably" could work for the 3D part.

There is also some workaround fixed to disable 3D altogether. By editing the xorg.conf: and adding the following:

Section "Module"
        Disable    "dri"
EndSection

(there are a couple of more xorg.conf edits in the link provided)

There is also a ticket system for bugs detected: http://www.openchrome.org/trac/report/1

(Some of the tickets have ideas and comments about how to fix some of the problems)

Lastly, if not downloaded already (It should be downloaded since it is done by default), download the xserver-xorg-video-openchrome package. And tell xorg.conf to use the following driver in the Device Section:

Driver "openchrome"

One final note, some links point to downloading the proprietary VIA driver for this from here: http://linux.via.com.tw/support/downloadFiles.action for what I could see it is very abandonware since the only one I found there was the 9.04 version driver.

Anyway you have several options that might help, others that might help and a little bit more complicated and the last ones which are just to eliminate 3D completely.

If the file xorg.conf is not found, you can created by doing the following:

1. Boot the system in Recovery Mode. You can do this by pressing ESC or leaving the SHIFT key pressed until the GRUB menu appears. Select Recovery Mode (Should be second option).

2. After booting go to the terminal as root. There is an option that tells you if you want to log in the terminal.

3. 输入X -configure。该X是大写。这将在当前主目录中创建文件xorg.conf.new。

4. 通过执行此操作来测试文件是否正常工作X -config xorg.conf.new。如果gui环境出现并且看起来不错，那么您可以执行以下步骤。如果没有，我建议编辑xorg文件并更改所需的任何内容，直到看起来不错为止。您可以使用nanonano xorg.conf.net进行编辑：进行任何修改并保存，方法是按CTRL + X并按Y保存并退出。

5. 复制新的xorg文件： cp xorg.conf.new /etc/X11/xorg.conf

6. 输入exit或reboot进行测试。