I have got an ATI Mobility Radeon HD 4300 Series (Microsoft Corporation - WDDM v1.1).
I have the latest available driver
https://gist.github.com/anonymous/c1bcc42f25add1ab0629It was working fine in windows 8.
.
I have upgraded to 8.1 and I face now the same problem of "Pixel format not accelerated".
Any clue ?
Thank you