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Even my x86 ThinkPad has had iGPU driver bugs surrounding LLC flushing with linux kernel updates over the years. They'd manifest with cache-line sized graphics
by pengaru 4y ago
Even my x86 ThinkPad has had iGPU driver bugs surrounding LLC flushing with linux kernel updates over the years. They'd manifest with cache-line sized graphics noise/artifacts particularly when showing fullscreen animations.
- monocasa 4y agoThat one I have under good authority is a hardware bug. PCI devices are supposed to be cache coherent, but Intel got a little too cute when integrating their iGPU into the uncore (and northbridge before it) at a level that looks like PCI to software but is their internal interconnects in actuality.