Intel and AMD (Radeon HD 4350/4550): two GPUs, three screens
After a lot of trial and error and reading of wikis and forum posts, I've got three screens running out of two GPUs with full acceleration throughout.
I'm running Arch Linux on a Gigabyte H81M-DS2V motherboard with an Intel Core i7-4790 featuring Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics.
Plugged in to the PCIe slot is an AMD/ATI RV710 [Radeon HD 4350/4550] graphics card.
I have xf86-video-ati and xf86-video-intel installed.
In the BIOS I have IGFX (the Intel integrated graphics) set to be the primary output.
To get the graphics drivers loaded as soon as possible, in /etc/mkinitcpio.conf I have...
...having added which I regenerated the initial ramdisk thus:
In /etc/X11/xorg.conf.d/ I have made two text files.
One is entitled 20-intel.conf and contains
The other is entitled 20-radeon.conf and contains
Rebooted. Logged into Plasma via SDDM. Everything works nicely.
Running glxgears from a terminal, the cogs turn smoothly on all screens. On the Intel GPU-powered screen the glxgears demo, with the window maximised, reports about 60FPS and on the AMD/ATI-powered screens it reports about 310FPS.
I'm running Arch Linux on a Gigabyte H81M-DS2V motherboard with an Intel Core i7-4790 featuring Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics.
Plugged in to the PCIe slot is an AMD/ATI RV710 [Radeon HD 4350/4550] graphics card.
I have xf86-video-ati and xf86-video-intel installed.
In the BIOS I have IGFX (the Intel integrated graphics) set to be the primary output.
To get the graphics drivers loaded as soon as possible, in /etc/mkinitcpio.conf I have...
Code:
MODULES=(radeon i915)
Code:
mkinitcpio -g /boot/initramfs-linux.img
One is entitled 20-intel.conf and contains
Code:
Identifier "Intel Graphics" Driver "intel" Option "DRI" "2" # DRI3 is now default #Option "AccelMethod" "sna" # default Option "AccelMethod" "uxa" # fallback EndSection
Code:
Section "Device" Identifier "Radeon" Driver "radeon" Option "ColorTiling" "on" Option "ColorTiling2D" "on" Option "DRI" "3" EndSection
Running glxgears from a terminal, the cogs turn smoothly on all screens. On the Intel GPU-powered screen the glxgears demo, with the window maximised, reports about 60FPS and on the AMD/ATI-powered screens it reports about 310FPS.
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