[sane-devel] Brother: does not scan

[AugustQ]

Hi,


I have an old workhorse, a Brother DCP 7010. This works (=scans) on
Ubuntu 16.04, but refuses to scan on Ubuntu 18.04 and 20.04 (in VM).

It prints without any problems.


The error-message of simple-scan on U18.04 is:

[+23,49s] DEBUG: simple-scan.vala:454: Requesting scan at 300 dpi from
device 'bus4;dev1'
[+23,49s] DEBUG: scanner.vala:1569: Scanner.scan ("bus4;dev1", dpi=300,
scan_mode=ScanMode.COLOR, depth=8, type=ScanType.SINGLE, paper_width=0,
paper_height=0, brightness=0, contrast=0, delay=10000ms)
[+23,49s] DEBUG: scanner.vala:806: Processing request
[+23,50s] DEBUG: scanner.vala:867: sane_open ("bus4;dev1") ->
SANE_STATUS_INVAL
[+23,50s] WARNING: scanner.vala:871: Unable to get open device: Invalid
argument

XSane delivers a similar argument. There is also a simple program on
GitHub with the name hellosane, but it also does not work.

lsusb shows me:

Bus 001 Device 005: ID 04f9:0182 Brother Industries, Ltd DCP-7010


I downloaded the sources of version 1.0.29 and it compiled OK. So how
can I activate the macros DBG(x."...")?

My assumption is that the problem happens in the function sane_open()
(in net.c). By using these macros I hope to narrow down the reason of my
problem.


Any tips please.

Thanks

AugustQ


PS: sane-find-scanner delivers:

[12:19:21.752915] [sanei_usb] libusb_scan_devices: device 0x04f9/0x0182,
interface 0 doesn't look like a scanner (0/7)
[12:19:21.752933] [sanei_usb] libusb_scan_devices: found libusb-1.0
device (0x04f9/0x0182) interface 1 at libusb:001:005
[12:19:21.752945] [sanei_usb] store_device: add dn 0 with libusb:001:005

....

found USB scanner (vendor=0x04f9, product=0x0182) at libusb:001:005



-------------- next part --------------
A non-text attachment was scrubbed...
Name: pEpkey.asc
Type: application/pgp-keys
Size: 2444 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/sane-devel/attachments/20200505/42ff2e07/attachment.key>