[mythtv-users] Intel GPU HD 630 Graphics Configuration

Stephen Worthington stephen_agent at jsw.gen.nz
Fri Sep 10 15:25:14 UTC 2021

On Fri, 10 Sep 2021 10:25:12 -0400, you wrote:

>> On Sep 9, 2021, at 4:23 PM, Jay Foster <jayf0ster at roadrunner.com> wrote:
>> I am hoping someone on this list might know something that could help me configure the Intel HD 630 graphics controller.
>> I recently needed to upgrade my motherboard due to signs of failure (it was over 11 years old).  I was running Ubuntu 20.04 LTS with the stock 5.4 kernel and a GT220 video card using the nvidia-340.108 driver.  The ethernet adapter in the new motherboard was not supported by the 5.4 kernel, so I updated the HWE (to 20.04.3) which comes with the 5.11 kernel.  I then discovered that the nvidia-340 driver will not compile with any kernel >= 5.5 (seems to be a known issue), so I tried switching to the built-in Intel video:
>> Graphics:
>>   Device-1: Intel driver: i915 v: kernel
>>   Display: x11 server: X.Org 1.20.11 driver: fbdev
>>   unloaded: modesetting,vesa resolution: 1920x1080~60Hz
>>   OpenGL: renderer: Mesa Intel UHD Graphics 630 (CML GT2) v: 4.6 Mesa 21.0.3
>> This "seems" to work, but I have noticed that black text on red backgrounds is blurry and I don't remember this issue with the GT220 card.  Some web searching leads me to the conclusion that the Intel video is not configured correctly (something to do with chroma subsampling YUV 4:2:0 vs RGB 4:4:4).  My search found many examples of this by others, but no solution as to how to fix it. One user's fix was to ditch the Intel video and install a separate video card.
>> Does anyone know how to configure the Intel GPU on linux to RGB mode?  The TV display is 1920x1080 at 60Hz, no UHD or 4K required.
>One thing that I believe has always messed with video on Intel has been compositing. I always turn this feature off when using the machine for mythtv . When I forget to do so on an intel based video machine, video acts weird, similar to the effects you are seeing above.

Yes, that needs to be off for Nvidia also.  In /etc/X11/xorg.conf add

Section "Extensions"
        Option "Composite"      "Disable"

More information about the mythtv-users mailing list