Hello,
I’m running Fedora 25 on Lenovo T460p with Intel HD Graphics 530 in processor and NVIDIA GeForce® 940MX. When I use CAC-1170 I’m able to get 3840×2160 at 30 HZ and even at 60 HZ but definitely not with 4:4:4 color sampling. However when I use Lenovo reduction I’m able to get 3840×2160 @30 HZ with 4:4:4 sampling.
Any idea why CAC-1170 won’t do 4:4:4 even @30 HZ?
Thanks!
When running in 3840×2160 at 60Hz in 4:4:4 the BPC needs to be at 8Bit BPC otherwise the signal will get too big …
HDMI2.0 has 18Gbps of bandwidth …
|
Resolution |
Refresh Rate |
Bits Per Color |
Chroma Sampling |
Bandwidth GBPS |
|
3840×2160 |
60 |
8 |
4:4:4 |
17,82 |
|
3840×2160 |
60 |
10 |
4:4:4 |
22,28 |
|
3840×2160 |
60 |
12 |
4:4:4 |
26,73 |
|
3840×2160 |
60 |
16 |
4:4:4 |
35,64 |
Please also check if your screen can do 4:4:4 at 4K 60 Hz, not all screens can do that …
I have not found anyone that could successfully do 3840×2160@60Hz in 4:4:4 mode using Intel HD graphics over DP>HDMI 2.0.
https://communities.intel.com/thread/111370
https://communities.intel.com/thread/111279
Hello, sure.
This is what my package manager has to say:
Name : xorg-x11-drv-nouveau
Arch : x86_64
Epoch : 1
Version : 1.0.13
Release : 1.fc25
Size : 213 k
Repo : @System
From repo : anaconda
Summary : Xorg X11 nouveau video driver for NVIDIA graphics chipsets
URL : http://www.x.org
License : MIT
Description : X.Org X11 nouveau video driver.
Hi Preichl,
Thanks a lot.
Running on Nvidia Kepler based graphics would indeed be a challenge to say the least. If the Notebook can also run on the Intel Graphics only, so with Nvidia Graphics Disabled completely, it should be able to work. The Intel 530 Graphics can do it, which would only leave you needing a decnt linux driver for HD 530 …
