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Old 2 Weeks Ago
rdikarlus rdikarlus is offline
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Default Using an HP DeskJet 2540 for scanning

Hi all,

I am trying to use my HP Deskjet 2540 to scan documents at home. It's a network printer-scanner that prints perfectly in my OpenBSD 6.4 and even starts scanning, but after some seconds this message appears and the scanning process finishes:
Code:
openbsdnew$ scanimage -p > image.pnm
dbus[57502]: arguments to dbus_connection_send() were incorrect, assertion "connection != NULL" failed in file dbus-connection.c line 3307.
This is normally a bug in some application using the D-Bus library.

  D-Bus not compiled with backtrace support so unable to print a backtrace
Abort trap (core dumped) 
openbsdnew$ scanimage > image.pnm    
dbus[40602]: arguments to dbus_connection_send() were incorrect, assertion "connection != NULL" failed in file dbus-connection.c line 3307.
This is normally a bug in some application using the D-Bus library.

D-Bus not compiled with backtrace support so unable to print a backtrace
Abort trap (core dumped
It seems that the D-Bus library was not correctly compiled. I assume it was installed in my system as part of a dependency when installing any package using the pkg_add command. Any idea how to solve this?

Thanks !

Last edited by rdikarlus; 2 Weeks Ago at 07:01 AM. Reason: Please use [code] & [/code] tags when posting console output.
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Old 2 Weeks Ago
johnR johnR is offline
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Quote:
D-Bus not compiled with backtrace support so unable to print a backtrace
This just means D-Bus was compiled without debugging symbols, which is normal. To get a meaningful backtrace from it you'd have to recompile it with debugging symbols.

What happens if you just turn D-Bus off? I have D-Bus installed as a dependency but I've never bothered to switch it on. Scanning, usually with xsane here, works fine.

To switch off D-Bus:
Code:
# /etc/rc.d/messagebus -f stop
To start it again (without rebooting):
Code:
# /etc/rc.d/messagebus start
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Old 2 Weeks Ago
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jggimi jggimi is online now
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rcctl(8) is the recommended command control for rc.d(8) operational management. For example, # rcctl stop messagebus.
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Old 2 Weeks Ago
rdikarlus rdikarlus is offline
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I found out the failure, thanks! messagebus must be started. It seems that with the default OpenBSD installation configurations it doesn't start by default when booting. Xsane and simple-scan are working fine now!

/etc/rc.d/messagebus start

Thanks,

Last edited by rdikarlus; 2 Weeks Ago at 07:02 AM.
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If you wish, you can use rcctl(8) to make this permanent.

# rcctl enable messagebus
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rdikarlus rdikarlus is offline
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Great!
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Old 2 Weeks Ago
johnR johnR is offline
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Quote:
Originally Posted by jggimi View Post
rcctl(8) is the recommended command control for rc.d(8) operational management. For example, # rcctl stop messagebus.
Thanks jggimi, that's good to know. I'm still getting used to OpenBSD after many years of Linux use.
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