Ubuntu – Xserver-xorg-video-intel in ppa:ubuntu-x-swat/x-updates

12.04ppa

I have two 12.04 , both update to 12.04.2 with kernel 3.2.0-43-generic.
Both are using ppa:ubuntu-x-swat/x-updates .
I find I install xserver-xorg-video-intel 2.20 in one 12.04 , 2.19 in the other 12.04.
Their systems are both updated.

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.19.0-0ubuntu1~xup1
  Candidate: 2:2.19.0-0ubuntu1~xup1
  Version table:
 *** 2:2.19.0-0ubuntu1~xup1 0
        500 http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
     2:2.17.0-1ubuntu4.4 0
        500 http://mirrors.ustc.edu.cn/ubuntu/ precise-updates/main amd64 Packages
     2:2.17.0-1ubuntu4 0
        500 http://mirrors.ustc.edu.cn/ubuntu/ precise/main amd64 Packages

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.20.0-0ubuntu0~precise1
  Candidate: 2:2.20.0-0ubuntu0~precise1
  Version table:
 *** 2:2.20.0-0ubuntu0~precise1 0
        100 /var/lib/dpkg/status
     2:2.19.0-0ubuntu1~xup1 0
        500 http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/ precise/main amd64 Packages
     2:2.17.0-1ubuntu4.4 0
        500 http://mirrors.ustc.edu.cn/ubuntu/ precise-updates/main amd64 Packages
     2:2.17.0-1ubuntu4 0
        500 http://mirrors.ustc.edu.cn/ubuntu/ precise/main amd64 Packages

Why can not I install 2.20 version in the other 12.04 ? In that 12.04's synaptics , I only find 2.19 version .
Why does that ppa offer differently in two systems ?
Thanks

Best Answer

  • The version 2.20.0 is a local package on your system, because it has no source repository currently associated with it. That means, either you have installed it as a .deb file manually, or you had an other source temporarily added in the past. My guess is, that you had the ppa:ubuntu-x-swat/intel-graphics-updates added to the software sources sometime earlier, did an upgrade, and later you have removed it or changed it to ubuntu-x-swat/x-updates. Based on the exact version string of the xserver-xorg-video-intel package, this seems obvious:

    PPA name:       ubuntu-x-swat/x-updates
    Latest version: 2:2.19.0-0ubuntu1~xup1
    
    PPA name:       ubuntu-x-swat/intel-graphics-updates
    Latest version: 2:2.20.0-0ubuntu0~precise1
    

    Here you can find a more recent version of this driver (2.21.6):

    ppa:glasen/intel-driver

    If you want to downgrade a package, you have to specify the exact version number to install:

    sudo apt-get install xserver-xorg-video-intel=2:2.19.0-0ubuntu1~xup1

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