Le 2021-05-16 22:26, Ellis Cohen a écrit :
Hi Ellis,
Can you test this :
SANE_DEBUG_AIRSCAN=255 scanimage -d 'airscan:e0:HP ScanJet Pro 2000 s2
(USB)' -A 2> airscan.log >airscan-capabilities.txt
SANE_DEBUG_HPAIO=255 scanimage -d
'hpaio:/net/scanjet_pro_2000_s2?ip=127.0.0.1&queue=false' -A 2>
hpaio-net.log >hpaio-net-capabilities.txt
SANE_DEBUG_AIRSCAN=255 scanimage -d 'airscan:e0:HP ScanJet Pro 2000 s2
(USB)' -p 2> airscan-scan.log >airscan-scan-capabilities.txt
SANE_DEBUG_HPAIO=255 scanimage -d
'hpaio:/net/scanjet_pro_2000_s2?ip=127.0.0.1&queue=false' -p 2>
hpaio-net-scan.log >hpaio-net-scan-capabilities.txt
sudo service ipp-usb stop
SANE_DEBUG_HPAIO=255 scanimage -d
'hpaio:/usb/HP_ScanJet_Pro_2000_s2?serial=CN09EA204V' -A 2>
hpaio-usb.log >hpaio-usb.capabilities.txt
SANE_DEBUG_HPAIO=255 scanimage -d
'hpaio:/usb/HP_ScanJet_Pro_2000_s2?serial=CN09EA204V' -p 2>
hpaio-usb-scan.log >hpaio-usb-scan-capabilities.txt
Thierry
Due to a hard failure in the boot loader, I had to completely
re-install my Fedora 33 system. (My attempts to just re-install the
boot loader didn't work.) Everything's once again working (including
my printer) *except* for the HP ScanJet Pro 2000 s2 scanner.
'scanimage -L' displays
device `plustek:libusb:003:005' is a Canon CanoScan N1220U flatbed
scanner
device `airscan:e0:HP ScanJet Pro 2000 s2 (USB)' is a eSCL HP
ScanJet Pro 2000 s2 (USB) ip=127.0.0.1
device `hpaio:/usb/HP_ScanJet_Pro_2000_s2?serial=CN09EA204V' is a
Hewlett-Packard HP_ScanJet_Pro_2000_s2 all-in-one
device `hpaio:/net/scanjet_pro_2000_s2?ip=127.0.0.1&queue=false' is
a Hewlett-Packard scanjet_pro_2000_s2 all-in-one
(The Canon N21220U is an oldie-but-goodie that I can access, but isn't
my concern. I want to use the ScanJet Pro.)
No matter whether ipp-usb is
* installed and running,
* installed and not running, or
* not installed,
and regardless of which of the three choices above I'm using to access
the scanner,
in all cases I get the unhelpful diagnostic message
Failed to open device
`hpaio:/usr/HP_ScanJet_pro_2000_s2?serial=CN09EA204V'
Error during device I/O.
I also tried removing the 'hplip' package, but that didn't help
either.
Any thoughts on what might be broken? Any debugging I could enable
that might shed light? Any further information I could provide to
help diagnose?
Thanks for any help you can provide.
Ellis
On Fri, Mar 5, 2021, at 9:33 AM, Ellis Cohen wrote:
Thanks for your help! IPP-over-USB _was_ the culprit (although I
have no idea exactly what latest-update from Fedora changed previous
behavior).
I determined that for my configuration, it was least-invasive to
simply execute
ipp_usb_was_active=false
sudo systemctl --quiet is-active ipp-usb
if [ $? -eq 0 ] ; then
ipp_usb_was_active=true
sudo systemctl stop ipp-usb
fi
before scanning, and
${ipp_usb_was_active} && sudo systemctl start ipp-usb
afterwards.
Again, thanks muchly!
Ellis
On Thu, Mar 4, 2021, at 9:43 PM, Zdenek Dohnal wrote:
On 3/4/21 7:39 PM, Alexander Pevzner wrote:
2) Remove hplip and scan driverlessly:
dnf erase hplip
dnf install sane-airscan
Btw, sane-airscan is installed by default if you have
sane-backends
installed :) . I changed that later...
--
Zdenek Dohnal
Software Engineer
Red Hat Czech - Brno TPB-C
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