Public bug reported:
I am trying to revive an old Acer 640U scanner that has been lying
around for a while. Everything I read seem so to indicate that it should
Just Work. However, although it is detected xsane cannot open it.
failed to open device 'snapscan:libusb:002;105'
$ scanimage -L
device `snapscan:libusb:002:105' is a Acer FlatbedScanner13 flatbed scanner
device `pixma:04A91912_4DF3FC' is a CANON CanoScan LiDE 400 multi-function
peripheral
device `airscan:e1:Canon LiDE 400 (USB)' is a eSCL Canon LiDE 400 (USB)
ip=127.0.0.1, ::1
snapscan.conf contains:
# Benq/Acer/Vuego 640U
usb 0x04a5 0x2060
lsusb says:
Bus 002 Device 105: ID 04a5:2060 Acer Peripherals Inc. (now
BenQ Corp.) Prisa 620U+/640U
My cannon scanner works fine
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xsane 0.999-12ubuntu4
ProcVersionSignature: Ubuntu 6.8.0-90.91-generic 6.8.12
Uname: Linux 6.8.0-90-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Fri Dec 19 13:27:04 2025
InstallationDate: Installed on 2020-09-17 (1919 days ago)
InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: xsane
UpgradeStatus: Upgraded to noble on 2024-09-29 (446 days ago)
** Affects: xsane (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
** Attachment added: "xsane-Screenshot_2025-12-19_13-09-58.png"
https://bugs.launchpad.net/bugs/2136870/+attachment/5934744/+files/xsane-Screenshot_2025-12-19_13-09-58.png
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https://bugs.launchpad.net/bugs/2136870
Title:
Acder/Benq 640U cannot oper libusb
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