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Re: Advantech PCM-5822

From: Doug Sutherland <>
Date: Mon, 3 Sep 2001 15:07:54 -0700

I forgot to mention that Xfree86 version 4.1.0 fixed my problems with 
x-windows on PCM-5822. Prior to this I was using version 3.6 with 
kernel 2.2.18 (as shipped with slackware 7.1). I reported a problem
with starting x, sometimes the machine would freeze, forcing me to 
pull the power. When it did that, the screen would either go blank
or I would get a smattering of white dots on black. I recently 
upgraded to slackware 8 with kernel 2.4.5 and Xfree 4.0.1. Now when
I start x-windows it never freezes. Interestingly it briefly does 
display the black screen with white dots, but it recovers. The new
4.1 x-windows server is slick. There is no need to use the old
"guess and try" method of configuring the proper server, modelines,
sync rates, or anything. Just do XFree86 -configure and it creates
an XF86Config file. There is no longer an SVGA server, one server 
works with all cards using loadable modules. Xfree 4.1 detected 
the MediaGX graphics controller and auto loaded the VESA driver. 

I'm still having cold start problems with IBM microdrive. Seems 
that uDrive needs to warm up before being useful, which equates 
to three or four reboots. I'm wondering if anyone has played with
the watchdog stuff on PCM-5822? It would be cool if I had a simple
watchdog timing out and rebooting till the microdrive warms up.

I'm also wondering if anyone has played with the power management 
stuff in PCM-5822 BIOS. It appears to allow shutting off devices
by IRQ or something like that. I'd love to power off the parallel
port and ethernet transceivers. Has anyone tried this?

One last comment -- I've said this before -- if you are using
PCM-5822 you need to find a way to brace the DB15 VGA connector.
It can break very easily. I have one that bent and separated 
from the board some time ago. Today it finally broke right off.
Fortunately I only use TFT LCDs with that particular board for
prototyping in-vehicle systems so its not a problem.

  -- Doug    

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