Linux 6.14 Preps UHBR For Intel Panther Lake, Lower Alchemist GPU Power Use With Whitelisted CPUs

[Valeintin]

even current alchemist HDMI port is merely a DP->HDMI adapter internally... there is no native HDMI support, plus Ive found the builtin converter to be flakey, so have resorted to using my own DP->HDMI converter...

I dunno how HDMI works inside iGPU but it may also be DP to HDMI. VRR works natively though.

inside Arrow Lake bigcore they do have hdmi 2.0, but that is not what iGPU does. https://videocardz.com/newz/leaked-d...hipset-details

[cutterjohn]

I think Intel might be do some weird offloading to iGPU on Intel CPUs that have Xe based iGPUs, and likely shutting down alchemist cards... as IIRC they were also claiming some slight perf increase if you had one of those Intel CPUs.... however IIRC there were anecdotal reports that if enabled it introduced microstuttering that was not perceptible w/it disabled, which further re-inforces the weird hybrid thing/idea/wag...

on a 7900X my a770 would idle 6-8W (1 2400p, 1 1080p monitor. windows 10/11) according to hwinfo at least and Intel's own little panel thing...

...no idea what its doing under linux... several months ago there were no hooks for most card data, and I haven't bothered to check again since then... best I could do would be wall power, but then Id need to go back to windows and hopefully have similar conditions then compare wall power totals... with a WAG that the difference is the dGPU....

[cutterjohn]

Can you address when Intell will add native HDMI 2.1 48 gbit/s in desktop Arrow Lake? Works fine on windows with my LG C9.

even current alchemist HDMI port is merely a DP->HDMI adapter internally... there is no native HDMI support, plus Ive found the builtin converter to be flakey, so have resorted to using my own DP->HDMI converter...

...although at the time there were alot of firmware and driver updates, so that builtin converter MAY be in better shape now, and for all I know may offer more functionality than my external converter, but it'd all be stuff that I don't use/care about as the HDMI monitor is my crappiest monitor anyways... (1080p, 75Hz just used as an auxiliary display... data, docs, so it's also in portrait orientation... does these jobs well enough...)

[Adarion]

I'm not really into the matter: But on the surface this article (and what it covers) seems to say that GPUs are dependent on CPUs for power savings. Huh? That sounds weird to me. I mean, the GPU should be able to operate on its own, to clock down, to power-gate things that are not needed - independent on the specific CPU. All the CPU should have to do with it is to be connected via bus(es) and run the driver software.
But why all that "Aww, no, you are an ABC CPU, I cannot powersave while you're near!"?
Puzzling, at least for me. Does anybody have good insights on that?

[Quackdoc]

I still have a bone to pick with them about this, and their *chirping crickets* response to it. Well, that, and the high idle power draw. Even if the new ones fix both things, I don't think I'll buy them, just as a matter of principle.

https://gitlab.freedesktop.org/drm/x...l/-/issues/234

is huc even needed on XE? last I checked i915 does everything xe does now.

[DanaG]

I still have a bone to pick with them about this, and their *chirping crickets* response to it. Well, that, and the high idle power draw. Even if the new ones fix both things, I don't think I'll buy them, just as a matter of principle.

https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/234

[PapagaioPB]

Intel has been in the game since the beginning. IIRC it was one of, if not the first vulkan driver in mesa. I would say they are very commited personally. I don't think you will reach radv levels of parity this generation. XE kernel driver is still new and the cards themselves are still relatively new. That being said, I'm going with intel. I have had enough of AMD's driver bugs and my A380 has been rock solid for me personally.

I really want to support Intel as well, much more than AMD, but it seems the community gives a lot of support to AMD, and the development of RADV seems to be everyone's focus. Many companies hire people to work on RADV, whereas Intel seems to be on its own with the development of ANV. Do you or anyone else have any idea how many developers Intel allocates to ANV?

[Quackdoc]

In your view, is Intel committed to the Open Source drivers for its GPUs? Do you think we'll reach the same level as RADV, meaning performance equal to or better than Windows?

I'm asking because I'm still deciding which new GPU to buy, either an Intel B580 or perhaps an RX 9060 XT.

Intel has been in the game since the beginning. IIRC it was one of, if not the first vulkan driver in mesa. I would say they are very commited personally. I don't think you will reach radv levels of parity this generation. XE kernel driver is still new and the cards themselves are still relatively new. That being said, I'm going with intel. I have had enough of AMD's driver bugs and my A380 has been rock solid for me personally.

[PapagaioPB]

In your view, is Intel committed to the Open Source drivers for its GPUs? Do you think we'll reach the same level as RADV, meaning performance equal to or better than Windows?

I'm asking because I'm still deciding which new GPU to buy, either an Intel B580 or perhaps an RX 9060 XT.

[Valeintin]

Can you address when Intell will add native HDMI 2.1 48 gbit/s in desktop Arrow Lake? Works fine on windows with my LG C9.