I confirm this issue for gnome-volume-control 2.28.1 (Karmic). As workaround I use 'gnome-alsamixer' to switch Headphone Jack Sense. BTW: even an About dialog is missing, use --version instead.
$ sudo lspci -vv
...
00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)
Subsystem: Hewlett-Packard Company Device 0934
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 21
Region 0: I/O ports at 3100 [size=256]
Region 1: I/O ports at 3200 [size=64]
Region 2: Memory at c8c01000 (32-bit, non-prefetchable) [size=512]
Region 3: Memory at c8c02000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Kernel driver in use: Intel ICH
Kernel modules: snd-intel8x0
I confirm this issue for gnome-volume- control 2.28.1 (Karmic). As workaround I use 'gnome-alsamixer' to switch Headphone Jack Sense. BTW: even an About dialog is missing, use --version instead.
$ sudo lspci -vv FBM/FR/ FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03) ,D1-,D2- ,D3hot+ ,D3cold+ )
...
00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/
Subsystem: Hewlett-Packard Company Device 0934
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 21
Region 0: I/O ports at 3100 [size=256]
Region 1: I/O ports at 3200 [size=64]
Region 2: Memory at c8c01000 (32-bit, non-prefetchable) [size=512]
Region 3: Memory at c8c02000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Kernel driver in use: Intel ICH
Kernel modules: snd-intel8x0