elly on Nostr: I really can't wait until gpu resetting on Linux will become a thing... Many ...

I really can't wait until gpu resetting on Linux will become a thing...

Many motherboards (especially reference boards from silicon vendors or laptops) allow you to enable/disable power to the slot by controlling the GPIO (SoC pincontrol).

You can spot this by looking for "rtd" in src/mainboard/* directory in coreboot tree, there are pins specified for PCIe power and reset.

Imagine being able to cut the power to something like a dedicated GPU in your system by setting PCIE_PWR pin low and decreasing your desktop power's consumption by ~30W (or even ~80W if you happen to use first-generation Intel Arc GPU).

Then when you want to play a game, you would set the pin high, DRM would re-initialize the card, and you could either play as-is (displays connected to iGPU would cost you *some* performance due to DMA framebuffer copy) or press the button on (very inexpensive these days) DP/HDMI switch and play with full performance straight from dGPU.

Of course none of that would be required *if* board vendor would implement ASPM correctly, but vast majority of board vendors fuck up their power management/board designs, so that would be nice to have.

(One day I will go insane enough to design an open-source ATX board that would implement everything correctly and use STM32 as an Embedded Controller)