LinuxQuestions.org - will a nVidia Quadro NVS 4200M work on Slackware64-current?

I got a Dell Latitude E6420 laptop from work and I want to run Slackware on it. Most of it is already OK, except video acceleration.

I followed this nvidia_optimus how-to. But haven't installed the nVidia driver yet.

The driver search at nVidia pointed me to this page:
http://www.geforce.com/drivers/results/52241

I downloaded it and tried to run it with X on (which I knew would tell me it would not work) and the installer said there was no compatible hardware. But this shows me what video hardware I got:

Code:

 # lspci -nn | grep VGA

00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09)                                            

01:00.0 VGA compatible controller [0300]: nVidia Corporation GF119 [Quadro NVS 4200M] [10de:1056] (rev ff)

I get VGA output to a bigger LCD screen, but no HDMI. How can I solve this?

Thanks in advance,
gtludwig