Comment 5 for bug 1703982

As a matter of fact, with hp-scan, the matter is worse:

1) Scanning in lineart mode fail with not enough data either with and without jpeg compression. In either case, scanning an A4 page in lineart at 300 dpi, the scan ends after 1 MB of data is read. Interestingly, 1 MB of data should indeed correspond to an A4 page at 300 dpi, 1 bit per pixel. Yet when the scan ends, the progess bar is at about 1/8 of fullscale.

2) In grayscale mode, the compression switch is recognized (the textual output of hp-scan reports it correctly), but ignored. Either with or without compression scanning an A4 paper in grayscale at 300 dpi reports 8.3 MB of data which is consistent with a raw 300dpi scan with 8 bits per pixel.