Can you reproduce this problem on current Ubuntu 9.04 still? If so, open a terminal and check if this reproduces it:
SANE_DEBUG_GENESYS=255 scanimage > /tmp/scan.png 2>/tmp/debug.log
please attach /tmp/debug.log here if this reproduces it. If it only occurs sometimes, please attach two versions of debug.log, one with the cracking noise and one without. Thank you!
Can you reproduce this problem on current Ubuntu 9.04 still? If so, open a terminal and check if this reproduces it:
SANE_ DEBUG_GENESYS= 255 scanimage > /tmp/scan.png 2>/tmp/debug.log
please attach /tmp/debug.log here if this reproduces it. If it only occurs sometimes, please attach two versions of debug.log, one with the cracking noise and one without. Thank you!