Comment 23 for bug 68267

I don't believe this is related to the exact package being installed, rather the installer itself or a back-end process.

And the various tests for nice values (i.e. Pauls comment #8 : https://launchpad.net/ubuntu/+source/xorg/+bug/68267/comments/8), is there other code to ensure that the value being tested is truly a number?
I.e. if the validate_nice_value() subroutine gets sent text (i.e. "x1" rather than "1"), won't this also produce a similar error?

How about this:
---
validate_nice_value () {
  _retval=1
  # first, try to subtract number from itself to validate numeric input
  # (expr is noisy, always throw away its output)
  set +e
  # Check for blank/null $1 variable.
  if [ ! -z "$1" ]; then
    # Exit because we were given a blank line.
  fi
  # >>>NOTE 1<<<
  expr "$1" - "$1" > /dev/null 2>&1
  if [ $? -ne 2 ]; then
    # now check for valid range
---

I can't think of a concise way to test for a string versus number to put in at the "NOTE 1" location.

Dan