I have a T410 with 256Mb of Video Memory and 1440x900 display, a T61 with 128Mb of Video Memory and 1400x1050 dsplay and external monitor HP w2338h with 1920x1080 resolution.
If I connect external monitor to my T410 and launch Visual Studio 2010 Beta 2 - image blinks and comes back with Aero disabled. Looking through event logs reveals the lack of memory. Simply running multiple instances of Visual Studio 2010 Beta 2 without external monitor causes Aero disabled as well.
Now If I do the same with my old Thinkpad T61, connect the same monitor using the same cable - I can open as many Visual Studio 2010 Beta 2 instances I like (tried 5) and nothing blinks and Aero stays enabled.
After doing some more checks there seems be an issue of using 4Gb sticks on T410 currently that results in video output artifacts and aero interface problems when using Lenovo supplied drivers v22.214.171.12425. I can confirm this to be true.
Possible workaround is to install modified EliteBook 8440p video driver (read along this thread) comes with a BIG drawback of not being able to change brightness level within Windows 7. To sweeten it a little bit - you can set luminance level at POST screen, when computer boots up.
Description: The Desktop Window Manager has encountered a fatal error (0x8007000e) Error 2/4/2010 7:32:21 PM Desktop Window Manager 9020 None
Does anyone know what path should I pursue to solve this issue?
Most of the community users get it fixed with the following driver. Should you still have the same issues, please start a new topics for discussion.
Software name NVIDIA Display Driver
Support models ThinkPad T410, T410i
ThinkPad T510, T510i
Operating System Microsoft Windows 7 32-bit / 64-bit
Refer to marketing materials to find out what computer models
support which Operating Systems.
Versions 126.96.36.19938 (Graphics)
Support devices NVIDIA Quadro FX 880M
NVIDIA NVS 3100M