Comment 7 for bug 391570

I have the same problem with 3.9.8. under kde 4.3.2, ubuntu 9.04. It also doesn't show up in the systray - just a black box, no icon. Clicking on it doesn't give any reactions.
Tried with standard values set, started with "never show up" and "always show up" option set, etc.
In system monitor it shows up three times when started.
I have two hp-printers - one at home and one in the office, which I connect over the network to.

Output of hp-systray -g (until it freezes and I have to kill it):

hp-systray[13075]: debug: Locking: /home/martin/.hplip/hp-systray.lock
hp-systray[13075]: debug: Creating pipe: hpssd (7) ==> systemtray (6)
hp-systray[13075]: debug: Creating pipe: hpssd (8) ==> hpdio (6)
hp-systray[13075]: debug: Creating pipe: hpdio (10) ==> hpssd (9)
hp-systray(hpdio)[13077]: debug: PID=13077
hp-systray(hpssd)[13076]: debug: PID=13076
hp-systray(hpssd)[13076]: debug: Entering main dbus loop...
hp-systray(qt4)[13075]: debug: PID=13075
hp-systray(qt4)[13075]: debug: Loading user settings...
hp-systray(qt4)[13075]: debug: FAB command: /usr/bin/hp-fab
hp-systray(qt4)[13075]: debug: Scan command: /usr/bin/xsane -V %SANE_URI%
hp-systray(qt4)[13075]: debug: Auto refresh: False
hp-systray(qt4)[13075]: debug: Auto refresh rate: 30
hp-systray(qt4)[13075]: debug: Auto refresh type: 2
hp-systray(qt4)[13075]: debug: Systray visible: 0
hp-systray(qt4)[13075]: debug: Systray messages: 0
hp-systray(qt4)[13075]: debug: Last used device URI: hp:/net/hp_LaserJet_4200?ip=192.168.20.3
hp-systray(qt4)[13075]: debug: Last used printer: photosmart_7700
hp-systray(qt4)[13075]: debug: Working directory: .
hp-systray(qt4)[13075]: debug: hp:/net/hp_LaserJet_4200?ip=192.168.20.3: back_end:hp is_hp:True bus:net model:hp_LaserJet_4200 serial: dev_file: host:192.168.20.3 zc: port:1
hp-systray(qt4)[13075]: debug: Cache miss: hp_laserjet_4200
hp-systray(qt4)[13075]: debug: Reading file: /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: Searching for section [hp_laserjet_4200] in file /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: Found section [hp_laserjet_4200] in file /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: Device URI socket://192.168.20.4:9100 is invalid/unknown
hp-systray(qt4)[13075]: debug: Exception: 4 (Unknown/invalid device-uri field)
hp-systray(qt4)[13075]: debug: Device URI cups-pdf:/ is invalid/unknown
hp-systray(qt4)[13075]: debug: Exception: 4 (Unknown/invalid device-uri field)
hp-systray(qt4)[13075]: debug: hp:/usb/photosmart_7700_series?serial=MY4CF2K16VU0: back_end:hp is_hp:True bus:usb model:photosmart_7700_series serial:MY4CF2K16VU0 dev_file: host: zc: port:1
hp-systray(qt4)[13075]: debug: Cache miss: photosmart_7700_series
hp-systray(qt4)[13075]: debug: Reading file: /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: Searching for section [photosmart_7700_series] in file /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: Found section [photosmart_7700_series] in file /usr/share/hplip/data/models/models.dat
hp-systray(qt4)[13075]: debug: hp:/net/hp_LaserJet_4200?ip=192.168.20.3: back_end:hp is_hp:True bus:net model:hp_LaserJet_4200 serial: dev_file: host:192.168.20.3 zc: port:1
hp-systray(qt4)[13075]: debug: hp:/net/hp_LaserJet_4200?ip=192.168.20.3: back_end:hp is_hp:True bus:net model:hp_LaserJet_4200 serial: dev_file: host:192.168.20.3 zc: port:1
hp-systray(qt4)[13075]: debug: hp:/usb/photosmart_7700_series?serial=MY4CF2K16VU0: back_end:hp is_hp:True bus:usb model:photosmart_7700_series serial:MY4CF2K16VU0 dev_file: host: zc: port:1
hp-systray(qt4)[13075]: debug: hp:/usb/photosmart_7700_series?serial=MY4CF2K16VU0: back_end:hp is_hp:True bus:usb model:photosmart_7700_series serial:MY4CF2K16VU0 dev_file: host: zc: port:1
Terminated