Switching Between KMS and Intel Drivers

asked 2018-12-12 16:57:45 -0500

pushqrdx gravatar image

The KMS driver should provide superior performance as many people say. However, for testing sake, how could i switch to and from the Intel driver?

The driver package is installed but adding a configuration file either to /etc/X11/xorg.conf.d/ or to /usr/share/X11/xorg.conf.d/ doesn't seem to have an impact on inxi's output as i get the following output regardless

Graphics: Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics driver: i915 v: kernel Display: x11 server: Fedora Project X.org 1.20.3 driver: i915
resolution: 1920x1080~60Hz OpenGL: renderer: Mesa DRI Intel Haswell Desktop v: 4.5 Mesa 18.2.6

Also, i couldn't help but notice that driver used in fedora is somehow called i915 instead of usual modesetting or intel which is the case with all other distros i have tried. Is there anything more to it in Fedora?

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I'm using "modesetting" and inxi reports:

driver: i915 v: kernel
Display: x11
server: Fedora Project X.org 1.20.3
driver: modesetting
resolution: 1366x768~60Hz
renderer: Mesa DRI Intel Haswell Mobile 
  v: 4.5 Mesa 18.2.6
fcomida gravatar imagefcomida ( 2018-12-12 18:42:22 -0500 )edit

@fcomida for some reason my driver under fedora is always i915 (i admit that Fedora performance is far superior to any other distro) but i doubt that this is the reason as i can't find anything about a driver called i915 other than that it refers to Intel Chipsets. Other thing too is that i have an Intel 4th gen processor which should read Haswell yet i am getting Xeon X3 as shown in the post. Is there any reason/explanation for this?

pushqrdx gravatar imagepushqrdx ( 2018-12-12 20:09:32 -0500 )edit

What's the output of lscpu from utils-linux? There's also lshw and its gui counterpart lshw-gui (their packages have the same name).

fcomida gravatar imagefcomida ( 2018-12-12 22:17:50 -0500 )edit

Besides Xeon it's a a brand name for x86 processors targeting non-consumer markets. Your Xenon E3 is based on the Haswell micro-architecture (consumer brands are Core i3, Core i5...). So you have a Xeon E3 manifactured around the old Haswell micro-architecture.

fcomida gravatar imagefcomida ( 2018-12-12 22:30:57 -0500 )edit

@fcomida yeah but my processor is Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz that's what i bought plus lscpu outputs it correctly like so. For some reason inxi shows Xeon though. I can't change driver between kms and intel though as it's stuck on i915 in inxi.

pushqrdx gravatar imagepushqrdx ( 2018-12-13 10:49:28 -0500 )edit