I'm running HPLIP 3.19.1, the device is a LaserJet MFP M28W.
Whenever I'm trying to scan (though hp-scan or xsane), I get I/O error messages.
Here's an output from hp-scan:
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HP Linux Imaging and Printing System (ver. 3.19.1)
Scan Utility ver. 2.2
Copyright (c) 2001-15 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
warning: No destinations specified. Adding 'file' destination by default.
Using device hpaio:/usb/HP_LaserJet_MFP_M28-M31?serial=VNC3C64767
Opening connection to device...
error: SANE: Error during device I/O (code=9)
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I've tried the troubleshooting steps listed in the question answers (installing the plugin, removing and then adding the device), but it didn't work.
hp-check reports that everything is OK: https://pastebin.com/2vP7KWCh
There's also a curious output from journalctl:
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фев 11 01:08:50 localhost.localdomain hp-scan[13424]: hp-scan[13424]: warning: No destinations specified. Adding 'file' destination by default.
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 418: escl_open() session=(nil)
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=1
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 535: claimed 7/1/2 interface
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 780: read actual device_id successfully fd=1 len=239
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 561: released 7/1/2 interface
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: common/utils.c 245: unable to load library libm.so: /usr/lib64/libm.so: invalid ELF header
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 59: Calling bb_open
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 80: Calling bb_load EXIT
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 438: escl_open() calling bb_escl.so PASSED
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 283: init_options....
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: bb_escl.c 1067: bb_open() escl entry.
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: bb_escl.c 939: bb_get_scanner_elements.
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: http.c 249: http_open() dd=1 channel=HP-ESCL-SCAN handle=0x56457ea4ddb0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 960: new HP-ESCL-SCAN channel=26 clientCnt=1 channelCnt=1
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 1566: invalid HP-ESCL-SCAN channel=26
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 975: removed HP-ESCL-SCAN channel=26 clientCnt=0 channelCnt=0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: http.c 263: unable to open HP-ESCL-SCAN channel
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: http.c 249: http_open() dd=1 channel=HP-IPP handle=0x56457ea4ddb0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 960: new HP-IPP channel=45 clientCnt=1 channelCnt=1
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 427: Found interface conf=0, iface=1, altset=1, index=3
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 389: Active kernel driver on interface=1 ret=0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 515: invalid claim_interface 7/1/4: Device or resource busy
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: io/hpmud/musb.c 975: removed HP-IPP channel=45 clientCnt=0 channelCnt=0
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: http.c 263: unable to open HP-IPP channel
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: bb_escl.c 947: unable to open http connection hp:/usb/HP_LaserJet_MFP_M28-M31?serial=VNC3C64767
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: bb_escl.c 977: bb_get_scanner_elements returning with (stat=1).
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: bb_escl.c 1211: bb_open() returning stat=1.
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: scan/sane/escl.c 89: Calling escl bb_unload:
фев 11 01:08:54 localhost.localdomain hp-scan[13424]: hp-scan[13424]: error: SANE: Error during device I/O (code=9)
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