好尴尬，跑分发现AMD独显还不如Intel集显

Sat, 24 Feb 2018 22:09:06 -0800 

Hi，各位好

  本人有一台Intel核显+AMD独显的Dell笔记本，因为AMD的私有驱动不能支持新的X.Org，所以想玩游戏的时候只能加参数指定显卡(
DRI_PRIME=1)。指定AMD玩游戏（Dota2/CSGO）会突然卡死，偶然间测了下，发现AMD显卡性能异常低下！有两个问题想请求下各位：
1.是我的测试方法不对吗？
2.还有办法在Debian 9 上安装AMD Catalyst Control Center么？我切不了显卡。。。


*配置信息：*

roy@dev:~$ screenfetch
         _,met$$$$$gg.           roy@dev
      ,g$$$$$$$$$$$$$$$P.        OS: Debian 9.3 stretch
    ,g$$P""       """Y$$.".      Kernel: x86_64 Linux 4.14.0-0.bpo.3-amd64
   ,$$P'              `$$$.      Uptime: 1h 58m
  ',$$P       ,ggs.     `$$b:    Packages: 2602
  `d$$'     ,$P"'   .    $$$     Shell: bash 4.4.12
   $$P      d$'     ,    $$P     Resolution: 1920x1080
   $$:      $$.   -    ,d$$'     DE: Gnome
   $$\;      Y$b._   _,d$P'      WM: GNOME Shell
   Y$$.    `.`"Y$$$$P"'          WM Theme: Adwaita
   `$$b      "-.__               GTK Theme: Adwaita [GTK2/3]
    `Y$$                         Icon Theme: Adwaita
     `Y$$.                       Font: Noto Sans CJK SC 12
       `$$b.                     CPU: Intel Core i7-7500U CPU @ 3.5GHz
         `Y$$b.                  GPU: Mesa DRI Intel(R) HD Graphics 620
(Kabylake GT2)
            `"Y$b._              RAM: 4847MiB / 19945MiB


roy@dev:~$ lspci -nnk | grep -E "VGA|Dis" -A3
00:02.0 VGA compatible controller [0300]: Intel Corporation Device
[8086:5916] (rev 02)
Subsystem: Dell Device [1028:0794]
Kernel driver in use: i915
Kernel modules: i915
--
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI]
Sun LE [Radeon HD 8550M / R5 M230] [1002:666f]
Subsystem: Dell Sun LE [Radeon HD 8550M / R5 M230] [1028:0794]
Kernel driver in use: radeon
Kernel modules: radeon, amdgpu


roy@dev:~$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x76 cap: 0xf, Source Output, Sink Output, Source Offload,
Sink Offload crtcs: 3 outputs: 4 associated providers: 0 name:modesetting
Provider 1: id: 0x4f cap: 0xd, Source Output, Source Offload, Sink Offload
crtcs: 0 outputs: 0 associated providers: 0 name:HAINAN @ pci:0000:01:00.0


*测试一下：*
# Intel 集显
roy@dev:~$ DRI_PRIME=0 vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
39719 frames in 5.0 seconds = 7943.673 FPS
37063 frames in 5.0 seconds = 7412.439 FPS
32327 frames in 5.0 seconds = 6465.186 FPS
33359 frames in 5.0 seconds = 6671.724 FPS
31272 frames in 5.0 seconds = 6254.299 FPS

# AMD 独显
roy@dev:~$ DRI_PRIME=1 vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
14097 frames in 5.0 seconds = 2819.355 FPS
16608 frames in 5.0 seconds = 3321.540 FPS
15826 frames in 5.0 seconds = 3165.040 FPS
15487 frames in 5.0 seconds = 3097.366 FPS
16625 frames in 5.0 seconds = 3324.930 FPS

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