[ltp] DVI throughput with port replicators/docking stations

Dax Kelson linux-thinkpad@linux-thinkpad.org
Mon, 07 Jun 2004 12:40:28 -0600

On Mon, 2004-06-07 at 19:57 +0200, André Wyrwa wrote:
> Hei,
> all the time i was dreaming of replacing my shiny old T23 with a shiny
> new T4Xp. The only thing that always bothered me is that those models
> are not compatible with my full dock anymore. However, i would have
> bought a new one than.
> But now i just read on IBMs web site that the DVI throughput in all
> three solutions (full dock, mini dock and port replicator) supports only
> resolutions up to SXGA, meaning 1280x1024.
> I own a 21"-TFT with UXGA resolution (1600x1200) that i always planned
> to attach to the DVI-through. Now it seem that's not at all possible.
> Are there any experiences in this area?


The limitation of 1280x1024 is purely a IBM ATI Windows driver problem.
The "IBM" ATI windows driver is multiple revisions out of date from the
latest official ATI driver.

IBM can fix it by resyncing up with ATI, but sadly they haven't done
this to date (it should be noted that both HP and Dell laptops will
officially do 1600x1200).

If you are stuck with Windows, the solution is to download the latest
ATI Catalyst drivers, and then use this tool:


(it modified/creates an INF file to enable installation of the latest
ATI Catalyst drivers on laptops).

Dax Kelson
Guru Labs