The left side volume toggle buttons for raising and lowering ringer and alerts is not working anymore. Only way to control the ringer and alerts is from inside the settings itself. What to do? iPhone 4s 5.0.1 jailbroke
Restore the phone to make sure it's not a hardware issue. If the buttons work after restore then it was a Cydia package you had installed causing the issue. If they still don't work after the restore then you have a hardware problem.
My iPhone 4 used to do that, hasnt happened on my 4s. The cause was dirt in the charge unit, the phone thought an
accessory was attached. Cleaned it with a toothbrush and it worked again.
Random and might not relate to your problem. Give the restore a go.