** Description changed:

  From my experience, this issue seems to me located somewhere in the
  MacBook C2D firmware, or perhaps in rEFIt, because the only fix I have
  found is to apply the Mac OS X 10.4.2 update
  [http://docs.info.apple.com/article.html?artnum=301722], which updates
  the firmwares and disables rEFIt.
  
  To reproduce this issue:
  1. Install Ubuntu or Kubuntu (6.04 or 6.10) in a MacBook using LILO for 
booting (not tested in Grub because root partition is /dev/sda5)
  2. Optionally, because makes no difference, upgrade your kernel (tested with 
last kernel in Ubuntu 6.10 and kernel 2.6.20.3 from kernel.org, making sure you 
enable ATA and ATA_PIIX for kernel 2.6.20.3)
  3. Install ndiswrapper from source (v1.39) or from Ubuntu 6.10 repository 
--ndiswrapper version also makes no difference.
  4. Install the Windows driver from 
ftp://ftp.software.ibm.com/pc/pccbbs/mobiles/7iwc21ww.exe by uncompressing it 
and doing ndiswrapper -i WINXP_2K/NET5416.INF and modprobe ndiswrapper.
  5. Reboot to see the efect, although the kernel 2.6.20.3 will not boot.
  5.a. If using kernel 2.6.20.3, reboot with previous kernel, uninstall 
kernel-image-2.6.20.3, uninstall ndiswrapper (make uninstall from its sources) 
and make sure to delete ndiswrapper.ko (/lib/modules/<version>/misc). Reboot, 
it should boot now.
  
  Now we are there. Try to use the integrated keyboard in LILO and you will not 
be able to do anything. Try with an external USB keyboard and you will be able 
to use it if *and only if* you plug it in the second USB port (the one nearest 
to the Shift key).
  When you boot the system and GDM or KDM starts, try to use the touchpad or 
any external USB mouse. Except with an external mouse in the second USB port, 
the cursor will move weirdly, as it were only receiving a small percentage of 
the signals. Same issue with keyboard, half of the keys you press will be lost, 
the other half may be randomly repeated. The effect makes it unusable, this is 
the same sentence using the integrated keyboard:
  
  Thecmasii  uunnssbb,,hhsstthh  aaee  sseeeeee  uussiing ttetkebrd.
  T efmae tusabl,tthhii  eemmsseeeeee  hhtteedd keeyybb.
  Thffeecc  mmiusaabbee, ts h ssaammeuitinrtedebrd
  
  The efffffffffect iss  stiilll  vverryy nnaasstt  iiffyyuu  ttyyppee
  sslloowwllyy  nntt ttoo  mmii  kkyysttrrooeess, yoo wwillllllll
  ssttillllllllmiis them or getthem repeated.
  
  I mean, the effect is still very nasty if you type slowly not to miss
  keystrokes, you will still miss them or get them repeated.
  
+ <b>EDIT:</b> UMS cameras and pendrives work perfectly in both USB ports.
+ 
  This happened to me one, just after trying to make the C2D Airport work
  with ndiswrapper, and then I was depressed until I updated Mac OS X. The
  updated make me reinstall rEFIt and Ubuntu, everything worked very fine
  until I tried again to make the C2D Airport work with ndiswrapper.
  
  Of course, every external keyboard and mouse, plus the integrated ones,
  work perfectly in Mac OS X. This is why I think the problem is somewhere
  between the MacBook firmware but it is the ndiswrapper (plus the Airport
  windows driver) what makes make issue arise.
  
  Any troubleshooting advise will be appreciated and probaby performed,
  because apparently the only way to reflash the MacBook firmware is
  erasing the whole hard drive and reinstalling Mac OS X from its DVD,
  which is not an option.
  
  Thanks a lot for your support.

** Description changed:

  From my experience, this issue seems to me located somewhere in the
  MacBook C2D firmware, or perhaps in rEFIt, because the only fix I have
  found is to apply the Mac OS X 10.4.2 update
  [http://docs.info.apple.com/article.html?artnum=301722], which updates
  the firmwares and disables rEFIt.
  
  To reproduce this issue:
  1. Install Ubuntu or Kubuntu (6.04 or 6.10) in a MacBook using LILO for 
booting (not tested in Grub because root partition is /dev/sda5)
  2. Optionally, because makes no difference, upgrade your kernel (tested with 
last kernel in Ubuntu 6.10 and kernel 2.6.20.3 from kernel.org, making sure you 
enable ATA and ATA_PIIX for kernel 2.6.20.3)
  3. Install ndiswrapper from source (v1.39) or from Ubuntu 6.10 repository 
--ndiswrapper version also makes no difference.
  4. Install the Windows driver from 
ftp://ftp.software.ibm.com/pc/pccbbs/mobiles/7iwc21ww.exe by uncompressing it 
and doing ndiswrapper -i WINXP_2K/NET5416.INF and modprobe ndiswrapper.
  5. Reboot to see the efect, although the kernel 2.6.20.3 will not boot.
  5.a. If using kernel 2.6.20.3, reboot with previous kernel, uninstall 
kernel-image-2.6.20.3, uninstall ndiswrapper (make uninstall from its sources) 
and make sure to delete ndiswrapper.ko (/lib/modules/<version>/misc). Reboot, 
it should boot now.
  
  Now we are there. Try to use the integrated keyboard in LILO and you will not 
be able to do anything. Try with an external USB keyboard and you will be able 
to use it if *and only if* you plug it in the second USB port (the one nearest 
to the Shift key).
  When you boot the system and GDM or KDM starts, try to use the touchpad or 
any external USB mouse. Except with an external mouse in the second USB port, 
the cursor will move weirdly, as it were only receiving a small percentage of 
the signals. Same issue with keyboard, half of the keys you press will be lost, 
the other half may be randomly repeated. The effect makes it unusable, this is 
the same sentence using the integrated keyboard:
  
  Thecmasii  uunnssbb,,hhsstthh  aaee  sseeeeee  uussiing ttetkebrd.
  T efmae tusabl,tthhii  eemmsseeeeee  hhtteedd keeyybb.
  Thffeecc  mmiusaabbee, ts h ssaammeuitinrtedebrd
  
  The efffffffffect iss  stiilll  vverryy nnaasstt  iiffyyuu  ttyyppee
  sslloowwllyy  nntt ttoo  mmii  kkyysttrrooeess, yoo wwillllllll
  ssttillllllllmiis them or getthem repeated.
  
  I mean, the effect is still very nasty if you type slowly not to miss
  keystrokes, you will still miss them or get them repeated.
  
- <b>EDIT:</b> UMS cameras and pendrives work perfectly in both USB ports.
+ EDIT: UMS cameras and pendrives work perfectly in both USB ports.
  
  This happened to me one, just after trying to make the C2D Airport work
  with ndiswrapper, and then I was depressed until I updated Mac OS X. The
  updated make me reinstall rEFIt and Ubuntu, everything worked very fine
  until I tried again to make the C2D Airport work with ndiswrapper.
  
  Of course, every external keyboard and mouse, plus the integrated ones,
  work perfectly in Mac OS X. This is why I think the problem is somewhere
  between the MacBook firmware but it is the ndiswrapper (plus the Airport
  windows driver) what makes make issue arise.
  
  Any troubleshooting advise will be appreciated and probaby performed,
  because apparently the only way to reflash the MacBook firmware is
  erasing the whole hard drive and reinstalling Mac OS X from its DVD,
  which is not an option.
  
  Thanks a lot for your support.

-- 
Keyboard & mouse become unusable after trying ndiswrapper for AirPort on a 
MacBook Core 2 Duo
https://launchpad.net/bugs/95376

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