[SOLVED] Simple Scan segfaults when scanning on "Photo"(24-bit) quality.

[Chris Rainey]

Simple Scan seg-faults when scanning at 24-bit(Photo) depth using the latest driver for my:

Model: Brother DCP-L2550DW
Driver: brscan4-0.4.6-1.amd64.deb

$ grep -i scan /var/log/syslog

<snip...>
Nov 25 12:42:45 CKR-1 systemd-udevd[496]: Invalid rule /etc/udev/rules.d/60-brother-brscan4-libsane-type1.rules:9: unknown key 'SYSFS{idVendor}'
Nov 25 12:43:18 CKR-1 dbus-daemon[2323]: [session uid=1000 pid=2323] Activating via systemd: service name='org.freedesktop.portal.Desktop' unit='xdg-desktop-portal.service' requested by ':1.106' (uid=1000 pid=6089 comm="simple-scan " label="unconfined")
Nov 25 12:43:26 CKR-1 simple-scan: io/hpmud/model.c 532: no ther_dcp-l2550dw_series attributes found in /usr/share/hplip/data/models/models.dat
Nov 25 12:43:26 CKR-1 simple-scan: io/hpmud/model.c 543: no ther_dcp-l2550dw_series attributes found in /usr/share/hplip/data/models/unreleased/unreleased.dat
Nov 25 12:43:53 CKR-1 kernel: [ 603.879672] scan-thread[6118]: segfault at 3ec ip 00007f9d432b29d2 sp 00007f9d43bbd810 error 4 in libsane-brother4.so.1.0.7[7f9d4328d000+2e000]
Nov 25 12:44:00 CKR-1 whoopsie-upload-all[6133]: Collecting info for /var/crash/_usr_bin_simple-scan.1000.crash...
Nov 25 12:44:00 CKR-1 whoopsie-upload-all[6133]: Marking /var/crash/_usr_bin_simple-scan.1000.crash for whoopsie upload
Nov 25 12:44:00 CKR-1 whoopsie[1825]: [12:44:00] Parsing /var/crash/_usr_bin_simple-scan.1000.crash.
Nov 25 12:44:00 CKR-1 whoopsie[1825]: [12:44:00] Uploading /var/crash/_usr_bin_simple-scan.1000.crash.
Nov 25 12:44:09 CKR-1 simple-scan: io/hpmud/model.c 532: no ther_dcp-l2550dw_series attributes found in /usr/share/hplip/data/models/models.dat
Nov 25 12:44:09 CKR-1 simple-scan: io/hpmud/model.c 543: no ther_dcp-l2550dw_series attributes found in /usr/share/hplip/data/models/unreleased/unreleased.dat
Nov 25 12:44:29 CKR-1 kernel: [ 640.437150] scan-thread[7013]: segfault at 3ec ip 00007f7dc012c9d2 sp 00007f7dab7fd810 error 4 in libsane-brother4.so.1.0.7[7f7dc0107000+2e000]
<...snip>

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: simple-scan 3.30.1.1-1
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Nov 25 12:44:45 2018
InstallationDate: Installed on 2018-11-23 (1 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: HP HP Slimline Desktop PC 270-p0xx
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-11-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: simple-scan
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/01/2018
dmi.bios.vendor: AMI
dmi.bios.version: F.35
dmi.board.asset.tag: CNV7280FKD
dmi.board.name: 82F2
dmi.board.vendor: HP
dmi.board.version: 00
dmi.chassis.asset.tag: CNV7280FKD
dmi.chassis.type: 3
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnAMI:bvrF.35:bd11/01/2018:svnHP:pnHPSlimlineDesktopPC270-p0xx:pvr:rvnHP:rn82F2:rvr00:cvnHP:ct3:cvr:
dmi.product.family: 103C_53311M HP Desktop
dmi.product.name: HP Slimline Desktop PC 270-p0xx
dmi.product.sku: Z5N91AA#ABA
dmi.sys.vendor: HP

[Chris Rainey (ckrzen)]

Output from simple-scan run in debug mode:

$ simple-scan -d
[+0.00s] DEBUG: simple-scan.vala:638: Starting Simple Scan 3.30.1.1, PID=29211

(simple-scan:29211): Gtk-WARNING **: 14:56:04.684: Failed to register client: GDBus.Error:org.gnome.SessionManager.AlreadyRegistered: Unable to register client
[+0.04s] DEBUG: app-window.vala:1715: Loading state from /home/chris/.cache/simple-scan/state
[+0.04s] DEBUG: app-window.vala:1672: Restoring window to 600x400 pixels
[+0.04s] DEBUG: app-window.vala:1676: Restoring window to maximized
[+0.04s] DEBUG: autosave-manager.vala:64: Loading autosave information
[+0.04s] DEBUG: autosave-manager.vala:259: Waiting to autosave...
[+0.07s] DEBUG: scanner.vala:1461: sane_init () -> SANE_STATUS_GOOD
[+0.07s] DEBUG: scanner.vala:1467: SANE version 1.0.27
[+0.07s] DEBUG: scanner.vala:1528: Requesting redetection of scan devices
[+0.07s] DEBUG: scanner.vala:806: Processing request
[+0.14s] DEBUG: autosave-manager.vala:281: Autosaving book information
[+0.18s] DEBUG: app-window.vala:1776: Saving state to /home/chris/.cache/simple-scan/state
[+8.26s] DEBUG: scanner.vala:341: sane_get_devices () -> SANE_STATUS_GOOD
[+8.26s] DEBUG: scanner.vala:353: Device: name="brother4:net1;dev0" vendor="Brother" model="*dcp-l2550dw" type="dcp-l2550dw"
[+9.48s] DEBUG: simple-scan.vala:455: Requesting scan at 300 dpi from device 'brother4:net1;dev0'
[+9.48s] DEBUG: scanner.vala:1576: Scanner.scan ("brother4:net1;dev0", dpi=300, scan_mode=ScanMode.COLOR, depth=8, type=ScanType.SINGLE, paper_width=2159, paper_height=2794, brightness=0, contrast=0, delay=10000ms)
[+9.48s] DEBUG: scanner.vala:806: Processing request
[+10.72s] DEBUG: scanner.vala:867: sane_open ("brother4:net1;dev0") -> SANE_STATUS_GOOD
[+10.72s] DEBUG: scanner.vala:888: sane_get_option_descriptor (0)
[+10.72s] DEBUG: scanner.vala:738: Option 0: name='(null)' title='Number of options' type=bool size=4 cap=soft-detect
[+10.72s] DEBUG: scanner.vala:741: Description: Read-only option that specifies how many options a specific devices supports.
[+10.72s] DEBUG: scanner.vala:888: sane_get_option_descriptor (1)
[+10.72s] DEBUG: scanner.vala:738: Option 1: name='(null)' title='Mode' type=group size=4 cap=advanced
[+10.72s] DEBUG: scanner.vala:741: Description:
[+10.72s] DEBUG: scanner.vala:888: sane_get_option_descriptor (2)
[+10.72s] DEBUG: scanner.vala:738: Option 2: name='mode' title='Scan mode' type=string size=30 values=["Black & White", "Gray[Error Diffusion]", "True Gray", "24bit Color", "24bit Color[Fast]"] cap=soft-select,soft-detect
[+10.72s] DEBUG: scanner.vala:741: Description: Select the scan mode
[+10.72s] DEBUG: scanner.vala:888: sane_get_option_descriptor (3)
[+10.72s] DEBUG: scanner.vala:738: Option 3: name='resolution' title='Scan resolution' type=int size=4 unit=dpi values=[100, 150, 200, 300, 400, 600, 1200, 2400, 4800, 9600] cap=soft-select,soft-detect
[+10.72s] DEBUG: scanner.vala:741: Description: Sets the resolution of the scanned image.
[+10.72s] DEBUG: scanner.vala:888: sane_get_option_descriptor (4)
[+10.72s] DEBUG: scanner.vala:738: Option 4: name='source' title='Scan source' type=string size=64 values=["FlatBed", "Automatic Document Feeder...

[Chris Rainey (ckrzen)]

***

SOLVED !!

***

All that was needed was to 'apt purge' the manually installed drivers:

$ sudo apt --auto-remove purge brscan4 dcpl2550dwpdrv

Then *BE SURE* to use the Brother installer script: linux-brprinter-installer-2.2.1-1.gz

(or whatever your current version is from the support.brother.com website, etc.)

Follow the instructions from the Brother download site and during the script installation to-the-letter(EXACTLY)!

*** CAVEAT: use the printer I.P. addy if on a LAN and _NOT_ the auto-detected mDNS addy if you have an AT&T Fiber residential gateway such as mine(BGW210-700) which has a ".local" domain hard-coded in the DNS. This effectively kills mDNS(Avahi) broadcasts and so I'm not able to connect to the printer using that system.

i.e.:

CUPS Connection: lpd://192.168.1.220/BINARY_P1

in my case.

Good Luck !!

[Chris Rainey (ckrzen)]

See comment #3