Since the A03 firmware update, a new problem seems to have come up with the tablet. When you wake up the tablet from sleep, the screen becomes completely unresponsive to the touch. The only way to get it back to work is to press and hold the power button to power down the tablet and press it again to power up the tablet. It is the same thing as pressing the reset button on a PC.
Now, I don't think the firmware is the culprit here. It most likely are the drivers that were released alongside the firmware. The issue is, we have to install these new drivers with the new firmware. That is specifically mentioned in the release notes. (This also applies to A04 update which I mentioned here.)
At first I thought it was an issue with Windows 8.1 Preview that I have been running for a couple of weeks. But when I refreshed the tablet and went back to the fresh Windows installation, the situation didn't change. It would randomly lose the touch support when it wakes up from sleep.
I talked with Dell Support personnel via Twitter. They told me to calibrate the display first but it didn't make the situation any better because it wasn't a calibration problem. Then they told me to refresh the tablet and see. When I told them that I had already done that, they told me to do a full recovery from the backup. I told them that I don't feel like going through with it.
