英文:
Why two terminals show different OpenGL versions?
问题
I work on Ubuntu 20.04.
我在Ubuntu 20.04上工作。
I updated graphics drivers and restarted X. I had to upgrade OpenGL since after upgrading drivers the OpenGL version was downgraded for some reason. I opened bash terminal and updated the drivers as described here:
我更新了图形驱动并重新启动了X。我不得不升级OpenGL，因为在升级驱动程序后，由于某种原因，OpenGL版本被降级了。我打开了bash终端，并按照这里的说明更新了驱动程序：
sudo add-apt-repository ppa:kisak/kisak-mesa
sudo apt update
sudo apt upgrade
Now, when I run glxinfo | grep "OpenGL version" either on terminal opened from VSCode or from Ubuntu itself it shows version 4.5.
现在，当我在从VSCode打开的终端或者从Ubuntu本身打开的终端上运行glxinfo | grep "OpenGL version"时，它显示版本为4.5。
user@user:~$ glxinfo | grep "OpenGL version"
OpenGL version string: 4.5 (Compatibility Profile) Mesa 23.1.0 - kisak-mesa PPA
But, when I open the terminal from Qt Creator it shows version 3.1
但是，当我从Qt Creator打开终端时，它显示版本为3.1。
user@user:~$ glxinfo | grep "OpenGL version"
OpenGL version string: 3.1 Mesa 21.2.6
How this even possible?
这怎么可能呢？
英文:
I work on Ubuntu 20.04.
I updated graphics drivers and restarted X. I had to upgrade OpenGL since after upgrading drivers the OpenGL version was downgraded for some reason. I opened bash terminal and updated the drivers as described here:
sudo add-apt-repository ppa:kisak/kisak-mesa
sudo apt update
sudo apt upgrade
Now, when I run glxinfo | grep "OpenGL version" either on terminal opened from VSCode or from Ubuntu itself it shows version 4.5.
user@user:~$ glxinfo | grep "OpenGL version"
OpenGL version string: 4.5 (Compatibility Profile) Mesa 23.1.0 - kisak-mesa PPA
But, when I open the terminal from Qt Creator it shows version 3.1
user@user:~$ glxinfo | grep "OpenGL version"
OpenGL version string: 3.1 Mesa 21.2.6
How this even possible?
答案1
得分: 3
Qt Creator有自己的环境变量，用于在构建项目时加载。
LD_LIBRARY_PATH 和 LIBGL_DRIVERS_PATH 中的路径指向 /snap/qtcreator-.../usr/lib/x86_64-linux-gnu/dri，其中包含比 /usr/lib/.../dri 中更新的图形驱动程序库。当Qt Creator启动的终端时，它会在那里查找驱动程序，而不是在新驱动程序已安装的 /usr/lib/... 中查找。
一旦我删除了 /snap/...，Qt Creator允许在默认位置 /usr/lib/... 中查找OpenGL库，那里安装了新的驱动程序。
英文:
Qt Creator has its own environment variables that it loads when building a project.
LD_LIBRARY_PATH and LIBGL_DRIVERS_PATH had paths to /snap/qtcreator-.../usr/lib/x86_64-linux-gnu/dri which has older graphics driver libraries than in /usr/lib/.../dri. When the terminal from Qt Creator started, it looked for drivers there and not in /usr/lib/... where new drivers werer installed.
Once I removed that /snap/... it allowed Qt Creator to look for OpenGL libraries in the default location /usr/lib/... where new dirvers where installed.
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