11-25-2009 08:34 AM - edited 11-25-2009 08:41 AM
I'm running Windows 7 on my X200. So far its worked well. Today, however, TVSU (v4.0) installed an update to the Intel graphics driver (GM45 display driver, 32 bit, v188.8.131.528) and now my external monitor is virtually useless. It's a Samsung 181T (1280x1024) and it was connected and in use at the time of the installation. After rebooting the monitor is so dark it's unreadable.
This is disappointing. I use my unit docked in an Ultrabase connected to a monitor and I need this to work properly.
It looks as if the system now detects the external monitor as having a resolution of 1280x800, instead of 1280x1024.
11-25-2009 09:16 AM - edited 11-25-2009 09:38 AM
As an update to the previous message: the monitor was previously detected and workd as a Generic PnP monitor. I've now dug out an old CD and installed the driver for it. The monitor is now correctly listed by make and model and the screen resolution defaults correctly, but at no resolution is the problem of the horrible display any better, neither using the Ultrabase nor the VGA output on the side.
My external display is unusable.
I would like to roll back this update but the option to do so isn't offered.
So far all of my TVSU updates have been flawless. This is really no fun at all.
it seems I am not alone: http://communities.intel.com/message/73840
i don't understand the fix referred to at the end of that thread:
go into BIOS and disable the Intel VT-d
I do not see an option to disable anything in the BIOS relevant to the display.
11-25-2009 10:56 AM - edited 11-25-2009 11:56 AM
Update: I found the BIOS setting -- under CPU. It's already disabled.
Disabling Aero makes no difference.
Thank heavens for Windows 7's system restore feature, which now lets you see what will be affected by a restore. I was able to go back to an earlier system state and my external display is working again.
I had a full backup but it was a few days old.
12-07-2009 07:49 AM - edited 12-07-2009 07:50 AM
There is no need to do a full system rollback
Short answer, the latest driver installed in error, adding onto the old driver.
Solution, uninstall the new driver from control panel,
then use device manager, find the display, uninstall and delete the driver (old one). this will cause your lenovo LCD to become very large, something like 640x480. No worries. Reboot
Find the new driver, reinstall and reboot. Everything works
12-07-2009 12:57 PM
Yes, I figured that out. I tried installing the old driver (you can find it via the "Driver Matrix" link on the Lenovo support site) but that didn't help. After deleting the Adapter in Device Manager and rebooting, it reinstalled the old driver and it is working fine now.