On Friday 6 September 2024 10:45:26 BST Peter Humphrey wrote: > On Friday 6 September 2024 10:10:47 BST Michael wrote: > > On Friday 6 September 2024 01:33:04 BST Peter Humphrey wrote: > > > On Friday 6 September 2024 00:21:31 BST Peter Humphrey wrote: > > > > I think I know what it is: the kernel's list of firmware blobs is > > > > empty. > > > > I > > > > don't know where they all went, but it shouldn't be too hard to find > > > > them. > > > > > > Indeed it was so. Now fixed and working fine. > > > > Without all requisite firmware for your graphics the Kwin compositor will > > fall back to software rendering. As you've experienced without hardware > > acceleration Kwin will eat up CPU cycles. > > > > Emerging sys-kernel/linux-firmware and configuring your system to use it > > fixes the problem by providing the necessary code for the graphics card to > > > do the heavy lifting: > Yes, I know, and I had it set up from when I acquired the machine. The > mystery is why it was missing from my two most recent kernels.
You could have inadvertently cleaned this package from your /var/lib/portage/ world, or unmerged it for some reason. Worth noting, dmesg would have complained it can't find this & that firmware. Either way, problem solved. :-)
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