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修复显卡名称带空格时（刚出的APU集显）字符串分割错误导致的设置失败 #1
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Consider the following command output:
$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x1e8 cap: 0x1, Source Output crtcs: 4 outputs: 2 associated providers: 1 name:NVIDIA-0
Provider 1: id: 0x45 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 2 associated providers: 1 name:Unknown AMD Radeon GPU @ pci:0000:06:00.0
Cutting "Unknown AMD Radeon GPU @ pci:0000:06:00.0" with the original method will get "0000", and setprovideroutputsource will fail.
The new method can get the complete GPU name.
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考虑如下命令输出，来自我的华硕天选
FA506笔记本（AMD Ryzen 4900h带集显 + RTX2060）：其中
Unknown AMD Radeon GPU @ pci:0000:06:00.0是我的集显名称，5.7.0版本内核带的开源驱动还没有识别这个显卡，所以名称长这样，带有好几个空格。如果用原来的分割方法，显卡名称就变成了
0000，setprovideroutputsource也就会失败。新方法可以正确获得GPU的完整名称
Unknown AMD Radeon GPU @ pci:0000:06:00.0，设置可以成功。图1：
xrandr --listproviders输出：图2：修改前只有独显外接的屏幕亮：
图3：旧版本的执行结果：
图4：修改后可以同时驱动内屏和外接屏幕了：
