Re: NVRM: os_schedule: Attempted to yield the CPU while in atomic[...] [260.19.21 x86
Same issue here. In my case, "laggy and unusable" means "it's completely frozen" and sometimes even alt+sysrq+b doesn't work.
Same laptop, latest BIOS (A5), Debian testing, vanilla 2.6.36, x86_64, 260.19.21.
(Tried these kernel options and it didn't help: pci=noacpi, pci=biosirq, noapic, irqpool)