It is possible your current Phenom II is not totally compatible due to not having the proper BIOS to support it.
Windows Device Manager claims optimal driver is installed (8.6 ATI Technologies Inc.).Īlso I'm getting the "too small screen area" issue on external screen, would appreciate a fix for that.įirst I would contact Lenovo Support to see if your laptop support the Phenom II Quad core CPU since according to the specs for your laptop it shows the following: Detailed specifications - ThinkPad Edge 14 / E40 and Edge 15 / E50 - US
Lenovo System Update shows AMD Graphic Driver for Windows 7 (8.722.0.0) as available (optional), but after installing it it shows it available again, repeatedly.
#Ati radeon hd 4250 driver windows 7 drivers
Random "EXT_framebuffer_object extension was not found" errors (also on unplugging the power supply), system crashes (attached).Ĭatalyst Control Center (2013.0429.2313.39747) doesn't seem to indicate any video hardware at all (although I remember it showing one a few months ago), and states "no AMD graphic driver (.) is installed" at startup, even though I installed appropriate drivers fromĪMD website and even though I did auto-detection/installation via the Adrenalin software. I'm getting changing hues (like two different color themes, similar to night and day profiles on iOs), It's a Windows 7 64-bit Lenovo ThinkPad Edge 14 E40 (upgraded to AMD Phenom II N970 Quad-Core 2.20 GHz and 8GB RAM) with ATI Mobility Radeon HD 4200 (according to the Device Manager) (however I believe I've seen 4250 detected at some moment, too)Īccording to the manufacturer's website it should be amd ATI mobility radeon M92-S2 XT w/512MB
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