T23, any chance to drive a Dell 2407WFP?

[ulrich.von.lich]

I checked on thinkwiki.org as well as the HMM but I couldn't seem to find any information on the maximum resolution a 16MB S3 can drive. So I was wondering if anyone has successfully hook up a T23 to an external WUXGA monitor via the DVI port of a dock or port replicator.

What about a Radeon 7500 (16MB or 32MB)?

Any thought would be appreciated!

[Johan]

Tony:

There is a very useful IBM-resource to dig up "old information", and it is the IBM Announcement Letters. If you search there using "Contents:" = "T23" and search from year 2000 to year 2003, then the 5th hit is New IBM ThinkPad T23 Notebook Computers — Great Performance in a Lightweight Package. There, it says:

Code: Select all

Video Modes

T23 (16M SDRAM) LCD with 1024 x 768 resolution

              LCD       External Monitor (CRT only mode)
 
 Resolution   TFT       85 Hz  75 Hz  72 Hz  70 Hz 60 Hz
 
  640 x 480   16M       16M    16M    16M    NA     16M
  800 x 600   16M       16M    16M    16M    NA     16M
 1024 x 768   16M       16M    16M    NA     16M    16M
 1280 x 1024  16M(13)   16M    16M    NA     NA     16M
 1400 x 1050  NA        NA     NA     NA     NA     NA
 1600 x 1200  16M(13)   64K    64K    NA     NA     64K

More generel information about T23's are found in the tawbook - entitled: "Personal Systems Reference, IBM ThinkPad Notebooks A, T, X, and G Series, 2000 to 2005 - withdrawn (May 2005 - Version 291).

I am not sure if this answer your question, but at least it gives you some kind of hint...

Update: I just found a better answer --> Overview - ThinkPad T23 - while using Google and searching for "t23 external monitor resolution"

Best regards,

Johan

[RealBlackStuff]

The DVI-port is not functional with a docked T23. You need to use the VGA port.

[pianowizard]

The DVI-port is not functional with a docked T23. You need to use the VGA port.

I agree. Support for DVI started with the A31p.

I tested a T23 recently and it couldn't output 1920x1200 to my Dell 2407WFP.

[Harryc]

PW, just to confirm ... I have a DVI KVM and I want to get a machine with DVI for it. So basically I am looking at A31P or better, so T30 does not have it?. Previously I had an R52 with an Intel video chipset, and that did not have it either, so certain integrated video chipset models don't have it, or they all don't? I had an X31 that did not have DVI ...

So if I were to develop a list, it's any of the below models without integrated graphics has DVI capability -

A31P
R40
T40/41/41/42/42 - Normal and P models
X40/X41 ??
R50/R51/R52
T60/T61 - Normal and P models
X60/X61 ??

[pianowizard]

Harryc, it turns out I wasn't 100% correct. I just looked at the Tawbook and found that the entire A-series had DVI support. For the T-series, it started with the T30. The A31p was the oldest Thinkpad I've owned that supports DVI. I think that's how I got things mixed up.

Anyway, the OP's T23 certainly can't utilize the dock's DVI port.

[Harryc]

PW, ok cool. So the entire list would look something like this -

A30/A31 - Normal and P models
T40/41/41/42/42 - Normal and P models
X40/X41 ??
R50/R51/R52
T60/T61 - Normal and P models
X60/X61 ??

What about 'R' models later than R30?

[Robbyrobot]

@Johan - Maybe I'm misunderstanding something here, but it looks like your list for the T23 resolutions includes 1600x1200 at 16M on the TFT. But how can this be if the TFT has a native resolution of 1024x768? I thought a TFT can't display more than the native resolution - is that wrong?

[RealBlackStuff]

There are 2 signals coming from the T23 gfx, one for the LCD and another to the VGA port, which can display higher res than the LCD.