无法载入X11字面为1,大小为16的字形-adobe-helvetica-%s-%s-*-*-%d-*-*-*-*-*-*-* 解决办法

f you recieve such messages in console:
Received X Intrinsics Warning <Cannot convert string "-adobe-helvetica-medium-r-normal-*-*-120-75-75-*-*-*" to type FontStruct
and other such messages, and Gambit crashes after trying to mesh (for example:
volume mesh volume.1 tetrahedral
)
then, install some packages: (Ubuntu, insert these lines in console - bash)

sudo apt-get install xfonts-75dpi
sudo apt-get install xfonts-100dpi
sudo apt-get install mesa-utils
sudo apt-get install libxtst-dev

Then edit xorg.conf;
sudo nano /etc/X11/xorg.conf

insert these strings:

Section "Files"
        FontPath        "/usr/share/X11/fonts/misc"
        FontPath        "/usr/share/X11/fonts/cyrillic"
        FontPath        "/usr/share/X11/fonts/100dpi"
        FontPath        "/usr/share/X11/fonts/75dpi"
EndSection

press Ctrl-O to save, ENTER. Then Ctrl-X to quit "nano" text editor.

At last, execute this line:
sudo dpkg-reconfigure -phigh xserver-xorg
and restart your computer. (you can restart only xserver  if you don't want to restart your computer)