I have the same problem with gscan2pdf 0.9.29 on Ubuntu 10.04 LTS (the Lucid Lynx) with HP Officejet Pro L7590 all-in-one.
Checking batch-scan option manually works but then the last page of the original is not completely ejected (although fully scanned) and printer gets stuck with "Scanning ... " on display. Pulling the paper out manually and pressing Cancel button on the printer fixes it. That only happens if batch-scan is checked so not a hardware issue.
Also, same as was the case for the OP, if batch-scan is checked scanner ignores the flatbed.
Please let me know if some additional information is needed.
I have the same problem with gscan2pdf 0.9.29 on Ubuntu 10.04 LTS (the Lucid Lynx) with HP Officejet Pro L7590 all-in-one.
Checking batch-scan option manually works but then the last page of the original is not completely ejected (although fully scanned) and printer gets stuck with "Scanning ... " on display. Pulling the paper out manually and pressing Cancel button on the printer fixes it. That only happens if batch-scan is checked so not a hardware issue.
Also, same as was the case for the OP, if batch-scan is checked scanner ignores the flatbed.
Please let me know if some additional information is needed.