On August 6, 2019 1:36:09 p.m. Ilia Mirkin <imirkin@xxxxxxxxxxxx> wrote:
Can you try something very simple - unplug the cable, and plug it back
in, while the TV is on, and set to the HDMI input?
I still only get 30Hz.
I did just update the tv firmware s9 maybe that is why I can't get it 60Hz
anymore.
I wish I kept better track of the timeline.
With the new HDMI 2 cable I get 4096x2160@30Hz (there is no 60Hz option).
3840x2160@59.9685Hz gives me no signal.
That should ensure
that the SCDC write can go through at modeset time.
You can also force nouveau to avoid any modes that require scrambling
by booting with nouveau.hdmimhz=340.
Cheers,
-ilia
On Tue, Aug 6, 2019 at 1:15 PM James <bjlockie@xxxxxxxxx> wrote:
I was going to buy a new cable and I came across this description:
Category 2 Certified HDMI wire supports resolutions up to 4Kx2K (UHD)
@30 Hz
https://www.cnet.com/how-to/what-is-hdmi-2-0b/
HDMI versions compared
HDMI Version Max Resolution Max 4K Frame rate HDCP 2.2 HDR
WCG Hybrid Log Gamma Dynamic Metadata
1.4 4K 30Hz No No No No No
2.0 4K 60Hz Yes No No No No
2.0a 4K 60Hz Yes Yes Yes No No
2.0b 4K 60Hz Yes Yes Yes Yes No
2.1 10K 120Hz Yes Yes Yes Yes Yes
"Category 2" implies HDMI 2 but the "Max 4K Frame rate" of 30Hz says it
is HDMI-1.4.
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