z@ubuntu:~$ sudo apt-get install mesa-utils
[sudo] password for z:
Sorry, try again.
[sudo] password for z:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package mesa-utils is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'mesa-utils' has no installation candidate
z@ubuntu:~$ glxinfo | grep render
The program 'glxinfo' is currently not installed. You can install it by typing:
sudo apt-get install mesa-utils
z@ubuntu:~$ ^C
z@ubuntu:~$ sudo apt-get install mesa-utils
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package mesa-utils is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'mesa-utils' has no installation candidate
z@ubuntu:~$ sudo gedit /etc/X11/xorg.conf
گرافیک من آن برد هست
بعد از این کارا بازم هنگ کرد