Ok so until today my Acer Iconia B1 has had no problems whatsoever with automatic screen rotation. Now though it is stuck in portrait mode and when I turn the tablet on it's side to make it turn to landscape it does nothing. No matter how many times I adjust the screen orientation settings from lock to automatic it still doesn't do anything.
I have tried a factory reset and this has not sorted the issue either.
I have checked that the accelerometor is working by downloading an app to test it and it is working fine.
How do I sort this issue out? This is really inconvenient for reading PDF files/browsing the internet and I am really dissappointed that a device that I have had for just over 4 weeks is now having problems like this.