xrandr: Failed to get size of gamma for output default

回答: 这个错误信息"xrandr: Failed to get size of gamma for output default"通常是由于显卡驱动或分辨率设置引起的。一种解决方法是编辑grub文件来修改分辨率设置。您可以打开终端并输入命令"sudo gedit /etc/default/grub"，然后搜索并编辑"GRUB_GFXMODE"的值，将其改为您想要的分辨率(例如"GRUB_GFXMODE=1024x768")，保存并关闭文件。接下来，运行命令"sudo update-grub"以更新grub配置。最后，重启系统以使更改生效。如果这个方法不起作用，您还可以尝试参考中提供的链接，其中介绍了如何使用xrandr来配置屏幕分辨率。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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