[ltp] Ultrabay & crash after suspend-to-ram (with solution)

[Henrique de Moraes Holschuh]

On Fri, 14 Mar 2008, Nils wrote:
> if somebody encounters the problem of a blinking cursor after resuming from 
> suspend-to-ram it can be this error:
> 
> You can reproduce it with the following steps:
> - insert a dvd ultrabay device
> - insert a cd or dvd
> - mount the device
> - => 1st suspend-to-ram
>  (... sleep ...)
> - => 1st wake up
> - umount the device
> - echo 1 > /sys/class/scsi_device/1:0:0:0/device/delete
> - echo eject > /sys/devices/platform/bay.0/eject
> - remove the ultrabay device 
> - => 2st suspend-to-ram
>  (... sleep ...)
> - => 2nd wake up
> - system is crashed with a blinking cursor in the left corner
> 
> *****
> I found the following solution: After removing the device I do 
> everytime an echo "0 0 0" > /sys/class/scsi_host/host1/scan
> and then it works fine.
> You can also add the command e.g. in /etc/acpi/sleep.sh and then it's startet 
> automatically before every suspend-to-ram action. It doesn't matter if it's 
> needed or not.
> *****

Looks like a kernel bug to me.  Which kernel?  I think 2.6.24 and 2.6.25 has
some borkage in this area.  If it is the same problem, people know about it
and are trying to fix it AFAIK.

Good to know of a workaround, though.  Thanks.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh