Your keyboard and mouse behave unexpectedly without any clear reason.
Your keyboard and mouse behave unexpectedly without any clear reason.
As others discussed, if your laptop keyboard detects you pressing control even without it, each key press will trigger ctrl+[the pressed key]. This likely causes the random zooming out in Chrome when you scroll. With a USB keyboard connected, the laptop keyboard stays active instead of disconnecting. If this happens, you might try unplugging the keyboard cable and covering it with paper to avoid short circuits. If the problem disappears, it could mean a spill damaged the keyboard and needs replacement.