Vista changes screen resolution when it boots without monitor attached.

[techs]

I have two computers attaced to a single 22 inch widescreen monitor. I use a kvm switch to go back and forth with another machine running WinXP. The resolution is set on both machines at the monitor default of 1680x1050.
On the Vista machine, if I don't have the kvm set to the Vista machine it changes the resolution to something like 1280x1024. I assume that is because it doesn't detect the monitor hooked up and reverts to one of the standard resolutions.
The WinXP machine doesn't have this problem.
I have tried some workarounds using the video cards utilities to force 1680x1050 without success.
Is there any way to force the machine into 180x1050 or to stop Vista from going out to detect the monitor on boot, or any other way to fix this?
Thanks

 

[zkaudio]

I believe it's a service called TMM... don't know much else though

 

[VinDSL]

Interesting!

I just disabled TMM on my Toshiba lappy. I run an external Dell monitor 99% of the time...

After rebooting, I didn't notice any difference in functionality - ran the internal panel - ran the external monitor - cloned them - did 1 -> 2, then 2 -> 1 - every mode possible - and it didn't seem to make any difference, disabling TMM, so I left it disabled.

While I've never experienced any problems, I could swear everything looks better now! 😀


EDIT


w00t! WooT! wO0t!!!

I spoke too soon... 🙂

Although I've never experienced any 'problems', I DID get some flashing every time I switched my IOGEAR MiniView KVM to the Vista lappy. It would flash 3 times, every time, like it was trying to resize the screen - never could figure this out, so I ignored it.

However, with TMM disabled, this 1-2-3 flashing is gone. YES!!! :thumbsup: :thumbsup:

Thanks, so much, zkaudio!!! :beer:

 

[bsobel]

Originally posted by: zkaudio
I believe it's a service called TMM... don't know much else though

Youll find it in Scheduled Tasks, under tasks\windows\mobilepc (Mobile something) look for the TMM task and right click and disable it. See if that resolves the issue. The TMM task deals with temporary displays (such as plugging your laptop into a second display or a projector).

The newest Nvidia drivers were conflicting with it here, so I just got done dealing with it.

Bill

 

[techs]

Originally posted by: bsobel

Originally posted by: zkaudio
I believe it's a service called TMM... don't know much else though

Youll find it in Scheduled Tasks, under tasks\windows\mobilepc (Mobile something) look for the TMM task and right click and disable it. See if that resolves the issue. The TMM task deals with temporary displays (such as plugging your laptop into a second display or a projector).

The newest Nvidia drivers were conflicting with it here, so I just got done dealing with it.

Bill

I had tried that a while back, to no effect, though like you say it could be my video card driver (GeForce 7300 LE) because I use the Nvidia driver and not the Microsoft generic driver.

 

[VirtualLarry]

I don't know if the problem is limited to Vista. I've had XP do similar things, with a Radeon X1950 Pro and older cat drivers. (6.12 I think)

 

[bsobel]

Originally posted by: VirtualLarry
I don't know if the problem is limited to Vista. I've had XP do similar things, with a Radeon X1950 Pro and older cat drivers. (6.12 I think)

Are you refering to changing at boot time, or booting normally then changing resolution once a user logs in?