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#1 2022-05-11 16:13

Registered: 2021-04-23
Posts: 63

SIS771/671 drivers, Bangho Mov / Clevo M540SS


I have just installed Q4OS on a rather old notebook "Bangho Mov / Clevo M540SS" (about 12 years old). Everything is magnificent, except the screen is not. The image is slightly distorted, wider than it should be. For example, a circle is an oval, slightly wider than high.

To solve the problem, I had to install old SIS drivers and make sure that my LCD display is set correctly.

Here my whole procedure:

1. Install SIS Driver using this method (xorg 1.20, or change value in script) … 52f18eac73

2. reboot

3. Check the result with:

xdpyinfo | grep -e dimensions -e resolution

4. Determine LCD size. Either measure directly or look up a list on the Internet. Here is one in German:

5. Check whether the dimension (including millimeters) corresponds to your LCD display and whether you have a DPI higher than 96. If it is not so, put "DisplaySize" in /etc/X11/xorg.conf , set it to the correct value and reboot.

My xorg.conf for a 14.1' LCD display with 16:10 ratio:

Section "Device"
    Identifier         "Configured Video Device"
    Driver             "sis671"

Section "Monitor"
    Identifier         "Configured Monitor"
    DisplaySize        305 189    # In millimeters

Section "Screen"
    Identifier         "Default Screen"
    Monitor            "Configured Monitor"
    Device             "Configured Video Device"

6. Check again the result with:

xdpyinfo | grep -e dimensions -e resolution

My result:

q4os@q4os-desktop:~$ xdpyinfo | grep -e dimensions -e resolution
  dimensions:    1440x900 pixels (307x191 millimeters)
  resolution:    119x120 dots per inch


Some helpful links with instructions on xorg and other possibilities of SIS drivers to download: … buntu.html

Take care with the offered xorg.conf files! Most of them contain a lot of code and a lot of it is unnecessary.

Last edited by JSM (2022-05-11 16:18)


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