airprint problem
My HPDeskjet2540 has recently (perhaps after a Big Sur upgrade) been failing to print. When the HP2540 is first powered-on it works OK, then a few minutes later it won't print again. The solution is to power-off/on, delete the items in the print queue, and start again. As far as I know the HP2540 has never changed, and has never previously behaved like this.
iMac 21.5″, macOS 11.2