ONE CASUALTY of the chip shortage is the little DRM chips used in Canon’s official printer cartridges. Normally, if you use a non-Canon cartridge, your printer pops up warning screens to complain. It also tells you the cartridge may be faulty and refuses to reveal how much ink or toner you have left. Obviously, the people who make your printer want you to buy their highlyprofitable cartridges, especially as they can hard-code page limits into them.