Not possible to set more than 512MB of VRAM

[JoaquinVacas]

EliteBook 845 G9 Running on the latest BIOS update (U82 01.08)

There's not way of setting more than 512MB of VRAM on this laptops.

We've received this units as new orders, so you've been selling this model but AFAIK HP didn't release a BIOS to do that.

Is there any release date for a BIOS with that issue solved? Not to mention the ASPM issues.

[Jupitero]

Hello.

The built-in graphics in your AMD CPU will allocate system memory as needed. What you select in BIOS only affects how the memory is reported to (older) software because some may expect a certain amount of VRAM. I'm not familiar with AMD drivers on Linux work but that's how it goes in Windows land.

This isn't an official HP channel so you'd have to contact HP directly about issues in BIOS.

[WAWood]

Apart from a few Workstations that come with Linux distro preloaded, HP provides no support for Linux.

I mention this because with Windows, we can provide links to videos and HP Documents. We can provide links to HP diagnostic apps you can download and run on your PC. We can provide links to HP drivers and to HP BIOS updates, which you can also download and run on your PC. And, nearly everything useful can be done using an application or utility that HP will provide you for free.

For the general population of HP customers trying to use or install Linux, we have NONE of that. No diagnostics. No videos. No downloadable utilities or tools. And, once you get into Linux, you discover that you have to become VERY familiar with the command line to do anything complicated. We have no command line scripts or examples to provide you.

So when I recommend going to the support forum for your Linux distro, it is because THERE is where you will get the amount and kind of support you need.

[JoaquinVacas]

Thank you for your response, WAWood.

But this machine was running Windows 10, then 11 and then Linux.

I don't care about the OS because the issue is more related to the firmware itself than the OS that you use in that laptop.

As said, the issue comes from the firmware not being able to change the allocated memory, not how the OS manages it, as it doesn't differ the way it does on Windows.

Yes, an iGPU shares the system memory dynamically. But a reservation makes that specific RAM to be ONLY available for the iGPU, so even on a OOM (Out Of Memory) case and/or under (standard system RAM) memory pressure it doesn't interfere with the GPU memory, as that part is untouchable for the rest of the system, it's transparent/abstracted for the final  OS itself.

Even being dynamically assigned, it shows some performance issues with lots of opened windows when using a high resolution display (4K + integrated display) no matter if you use Windows 10, 11, Linux or whatever.

Which another ThinkPad laptop with the same hardware at 512MB VRAM shows the same performance issues (same CPU/iGPU) it really improves when allocating something like 2 or 4GB.

So, not being my specific machine+OS combination but a firmware issue, is there any fix coming with next firmware updates?

Thank you.