> What are you trying to do? A large desktop spread across both chips? > Use the chips independently? There is no support for crossfire on Linux. If you want to use a desktop across multiple chips or select which chip is used for rendering, you can use xrandr and the prime support in X: > https://wiki.archlinux.org/index.php/PRIME I want to select one chip to render for my application. And now I know how to select which chip: after set env DRI_PRIME=1 , the second chip will be used. But there is another problem: the second chip's performance is very bad , only 1/4 of the first chip. xrandr --listproviders: Providers: number : 2 Provider 0: id: 0x7f cap: 0x9, Source Output, Sink Offload crtcs: 6 outputs: 4 associated providers: 1 name:AMD Radeon (TM) Pro WX 7100 Graphics @ pci:000d:33:00.0 Provider 1: id: 0x45 cap: 0x6, Sink Output, Source Offload crtcs: 6 outputs: 0 associated providers: 1 name:AMD Radeon (TM) Pro WX 7100 Graphics @ pci:000d:34:00.0 Here is the results of running glxgears: DRI_PRIME=1 vblank_mode=0 glxgears ATTENTION: default value of option vblank_mode overridden by environment. 5486 frames in 5.0 seconds = 1097.200 FPS DRI_PRIME=0 vblank_mode=0 glxgears ATTENTION: default value of option vblank_mode overridden by environment. 19846 frames in 5.0 seconds = 3969.058 FPS How to resolve this? > On Wed, Mar 14, 2018 at 5:41 AM, Lvzhihong (ReJohn) <lvzhihong1 at huawei.com> wrote: > Hi All , > > Does mesa support Radeon Pro Duo? I donâ??t know how to configure > xorg.conf to use two WX7100 card of DUO , and now I can only use the first card of DUO. > > What are you trying to do? A large desktop spread across both chips? > Use the chips independently? There is no support for crossfire on Linux. If you want to use a desktop across multiple chips or select which chip is used for rendering, you can use xrandr and the prime support in X: > https://wiki.archlinux.org/index.php/PRIME > > Alex > > Installed software packages: xserver-xorg xfce4 xinit > > Mesa version: 17.2.8 kernel version: 4.15 > > > > Pci information: > > 000d:31:00.0 PCI bridge: PLX Technology, Inc. PEX 8747 48-Lane, 5-Port > PCI Express Gen 3 (8.0 GT/s) Switch (rev ca) > > 000d:32:08.0 PCI bridge: PLX Technology, Inc. PEX 8747 48-Lane, 5-Port > PCI Express Gen 3 (8.0 GT/s) Switch (rev ca) > > 000d:32:10.0 PCI bridge: PLX Technology, Inc. PEX 8747 48-Lane, 5-Port > PCI Express Gen 3 (8.0 GT/s) Switch (rev ca) > > 000d:33:00.0 VGA compatible controller: Advanced Micro Devices, Inc. > [AMD/ATI] Ellesmere [Radeon Pro WX 7100] > > 000d:33:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] > Device > aaf0 > > 000d:34:00.0 Display controller: Advanced Micro Devices, Inc. > [AMD/ATI] Ellesmere [Radeon Pro WX 7100] > > > > My xorg.conf: > > Section "Device" > > Identifier "AMD" > > Driver "amdgpu" > > BusID "pci:51 at 13:00:00" > > EndSection > > Section "Monitor" > > Identifier "monitor0" > > Option "enable" "true" > > EndSection > > Section "Screen" > > Identifier "screen0" > > Device "AMD" > > Monitor "monitor0" > > DefaultDepth 24 > > SubSection "Display" > > Depth 24 > > EndSubSection > > EndSection > > > > I use â??startxâ?? to start desktop , and only the first WX7100(PCI Bus ID: > 000d:33:00.0) being used , the second WX7100(PCI Bus ID: 000d:34:00.0) > has no load . > > Even if I set BusID as "pci:52 at 13:00:00" (the second WX7100), > it still only the first WX7100 being used. > > > > So , How to enable Radeon Pro Duo with opensource driver , does > my xorg.conf is wrong or mesa doesnâ??t support Radeon Pro Duo? > > > > > > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx >
