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by Tilo Sloboda, last update: $Revision: 1.2 $ / $Date: 2002/03/25 19:45:52 $ GMT , initial version: 9 November 2001

RedHat 7.2 LINUX on IBM ThinkPad A22p Laptops

This page describes how to install LINUX (RedHat 7.2 / 2.4.7-10 kernel) on IBM ThinkPad A22p laptops. My exact model number is 2629U2U

The following page by Peter Schwenke gives a very good overview about the installation.

If you want to get rid of Gnome or KDE and use Fvwm instead, you might want to have a look at this page.

I will add on to this page, so that it can be used as a supplement to Peter's page above.

Problems Installing RedHat 7.2

Shortly after installing RedHat 7.2, the LINUX 2.4.7-10 kernel started to hang during booting -- you could call this a show stopper -- to fix this, I had to upgrade the kernel to 2.4.14. Later I learned, that i must have accidentially removed the empty directory /initrd - which caused that problem - duh!

After upgrading the kernel to 2.4.14, other problems continued - mostly with the PCMCIA support and the CD-writer (when you recompile the kernel, you need to add the ide to scsi support). Here are some of the problems i ran into trying to use a CompactFlash to PCMCIA adapter, as well as a new SIIG US2256 CompactFlash Card Reader.

PCMCIA support, hotplug support and USB support still seems to be half-baked. :(

Adding Memory

The 128MB PC133 memory module which came with the notebook was a Samsung M464S1724CT1-L1L , using Samsung K4S281632C-TL1L memory chips

As you can see from Samsung's web-page above, the A22p Thinkpad needs 100MHz or 133MHz, 3.3V so-DIMMS with CL3 and 16Mx64 or 32Mx64 organization.. CL refers to the cycle length between two read accesses it's either 2ns (CL2) or 3ns (CL3). As CL2 memory is faster, it works for laptops which try to access it in CL3 mode.

The IBM original part number for the 256MB RAM so-DIMMS is IBM 33L3069. Two-bank memory design organized as 32Mx64 , 144pin so-DIMM.

Replacing the Network Card/Modem

Before purchase the IBM sales rep told me, that the option for the build in modem would refer to a PCMCIA card - DUH!!! that's wrong!! The modem card is a mini-PCI card.

If you have a A22 ThinkPad where the RJ11 network plug in the back is not working, you might want to replace or upgrade the built-in V56 modem mini-PCI card. You need a type III mini-PCI card!

The IBM and 3Com 100baseT/V56modem combo cards have a software modem on there.. this usually causes problems with LINUX.

Here is a short list of mini-PCI cards which might be interesting for you:

I bought the 3Com 10/100baseT / Modem card for about $95 but had problems getting the network card configured correctly under RedHat 7.2 .. not the only problem with RedHat 7.2 as you will see if you read on..

I haven't tried any of the other cards myself, but shopped around and assembled the above list. Note that there are different form factors for mini-PCI: type I, type II and type III. I'm not 100% sure that all the cards above actually fit into the A22p. I hope that this info might be useful for you as a starting point. ActionTec seems to be the Original Equipment Manufacturer for IBM - they seem to build those wireless ethernet / modem combo cards in the new A30p.. but they only sell it to IBM :((

Hard Drive Assembly

Looks like a very easy task to replace the built-in harddrive with a higher capacity one at a later point in time.. My laptop came with a IBM TravelStar 32GB 2.5" EIDE harddrive Model# IC25T048ATDA05-0 . Picture coming soon.

Virgin A22p Hard Drive Partitions

First thing, when I switched on my A22, it wanted to go to Windows and finish the Windows installation -- YUCK!!! A quick reboot with the RedHat CD, "expert text", and and fdisk, gave the following pre-installed disk partitions:
       BOOT   Start     End                 ID     System
hda1     *        1    3925     29672968+    c     Win95 Fat32
hda2           3926    4134      1580040    1c     Hidden Win95 Fat32
DANGER Will Robinson! apparently the second partition contains all the software to act as a Windows 2000 professional recovery CD..

After I opened the box, I couldn't find any Windows or other CDs.. Looks like IBM wanted to save some serious $$$ and decided not to ship any software on CDs with the notebook, rather wasting 1.5 Gigabyte of disk space for this hidden recovery partion! This partition is all you get!

With other words: if you remove it you're screwed! If you keep it you're screwed also, because when using it, it will reinstall the OS with the same partition information as when you bought the notebook - killing the LINUX installation. And last not least: when I talked to an IBM technician, he told me that they will mail me the recovery and system CDs and it will take 10 business days until I receive them! Now I'm really screwed, because @#$(*&!! Windows 2000 needs to be installed before LINUX, because of the stupid Windows boot loader! With other words I have to wait for 10 days and keep this toy operating system on my nice new notebook for another 10 days, before I can upgrade it with LINUX! THANK YOU IBM!! How thoughtful of you guys to save the $1 those CDs would have cost you extra per unit! Great thinking on your part!!

Problems with hot-pluggable devices

Even after upgrading the kernel to 2.4.14, I continued to have problems trying to read pictures of my CompactFlash card on my LINUX laptop. I ran into problems with both the CompactFlash to PCMCIA adapter, as well as the new SIIG US2256 CompactFlash Card Reader, which I bought recently.

My Appologies

This page is not yet completely finished..


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Maintainer: Tilo Sloboda tiloNOSPAM@cs.cmu.edu
last update: $Revision: 1.2 $ / $Date: 2002/03/25 19:45:52 $ GMT