I experience this exact problem with an Inspiron 6400 too. It does not happen in all cases, but it is rare when it's working. Happens in three ways: 1. When I plug in the headphone, both the speaker and the headphone are muted 2. When I plug out the the headphone(which worked properly) the speaker is still muted.(plugging back the headphone works once again) 3. When I plug in headphone jack, both the speaker and the headphone is working.
Here are the previously mentioned information from DebuggingSoundProblems: [EMAIL PROTECTED]:~$ tail -2 /proc/asound/oss/sndstat Mixers: 0: SigmaTel STAC9200 [EMAIL PROTECTED]:~$ amixer Simple mixer control 'Master',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 31 [100%] [on] Front Right: Playback 31 [100%] [on] Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 235 [92%] Front Right: Playback 235 [92%] Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined cswitch cswitch-joined Playback channels: Mono Capture channels: Mono Mono: Playback [on] Capture [off] Simple mixer control 'Capture',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 15 Front Left: Capture 0 [0%] [on] Front Right: Capture 0 [0%] [on] Simple mixer control 'Capture Mux',0 Capabilities: volume Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 4 Front Left: 2 [50%] Front Right: 2 [50%] Simple mixer control 'Input Source',0 Capabilities: enum Items: 'Mic' 'Front Mic' 'Line' Item0: 'Mic' [EMAIL PROTECTED]:~$ amixer Simple mixer control 'Master',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 31 [100%] [on] Front Right: Playback 31 [100%] [on] Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 235 [92%] Front Right: Playback 235 [92%] Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined cswitch cswitch-joined Playback channels: Mono Capture channels: Mono Mono: Playback [on] Capture [off] Simple mixer control 'Capture',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 15 Front Left: Capture 0 [0%] [on] Front Right: Capture 0 [0%] [on] Simple mixer control 'Capture Mux',0 Capabilities: volume Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 4 Front Left: 2 [50%] Front Right: 2 [50%] Simple mixer control 'Input Source',0 Capabilities: enum Items: 'Mic' 'Front Mic' 'Line' Item0: 'Mic' [EMAIL PROTECTED]:~$ sudo lspci -nv 00:00.0 0600: 8086:27a0 (rev 03) Subsystem: 1028:01bd Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information 00:02.0 0300: 8086:27a2 (rev 03) Subsystem: 1028:01bd Flags: bus master, fast devsel, latency 0, IRQ 169 Memory at eff00000 (32-bit, non-prefetchable) [size=512K] I/O ports at eff8 [size=8] Memory at d0000000 (32-bit, prefetchable) [size=256M] Memory at efec0000 (32-bit, non-prefetchable) [size=256K] Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Capabilities: [d0] Power Management version 2 00:02.1 0380: 8086:27a6 (rev 03) Subsystem: 1028:01bd Flags: bus master, fast devsel, latency 0 Memory at eff80000 (32-bit, non-prefetchable) [size=512K] Capabilities: [d0] Power Management version 2 00:1b.0 0403: 8086:27d8 (rev 01) Subsystem: 1028:01bd Flags: bus master, fast devsel, latency 0, IRQ 225 Memory at efebc000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Capabilities: [70] Express Unknown type IRQ 0 Capabilities: [100] Virtual Channel Capabilities: [130] Unknown (5) 00:1c.0 0604: 8086:27d0 (rev 01) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=0b, subordinate=0b, sec-latency=0 Memory behind bridge: efd00000-efdfffff Capabilities: [40] Express Root Port (Slot+) IRQ 0 Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable+ Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5) 00:1c.3 0604: 8086:27d6 (rev 01) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=0c, subordinate=0d, sec-latency=0 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: efa00000-efcfffff Prefetchable memory behind bridge: 00000000e0000000-00000000e0100000 Capabilities: [40] Express Root Port (Slot+) IRQ 0 Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable+ Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5) 00:1d.0 0c03: 8086:27c8 (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 217 I/O ports at bf80 [size=32] 00:1d.1 0c03: 8086:27c9 (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 225 I/O ports at bf60 [size=32] 00:1d.2 0c03: 8086:27ca (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 233 I/O ports at bf40 [size=32] 00:1d.3 0c03: 8086:27cb (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 50 I/O ports at bf20 [size=32] 00:1d.7 0c03: 8086:27cc (rev 01) (prog-if 20) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 217 Memory at ffa80000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port 00:1e.0 0604: 8086:2448 (rev e1) (prog-if 01) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=32 Memory behind bridge: ef900000-ef9fffff Capabilities: [50] #0d [0000] 00:1f.0 0601: 8086:27b9 (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information 00:1f.2 0101: 8086:27c4 (rev 01) (prog-if 80) Subsystem: 1028:01bd Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 209 I/O ports at <ignored> I/O ports at <ignored> I/O ports at <ignored> I/O ports at <ignored> I/O ports at bfa0 [size=16] Capabilities: [70] Power Management version 2 00:1f.3 0c05: 8086:27da (rev 01) Subsystem: 1028:01bd Flags: medium devsel, IRQ 4 I/O ports at 10c0 [size=32] 03:00.0 0200: 14e4:170c (rev 02) Subsystem: 1028:01af Flags: bus master, fast devsel, latency 64, IRQ 209 Memory at ef9fe000 (32-bit, non-prefetchable) [size=8K] Capabilities: [40] Power Management version 2 03:01.0 0c00: 1180:0832 (prog-if 10) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 64, IRQ 177 Memory at ef9fd800 (32-bit, non-prefetchable) [size=2K] Capabilities: [dc] Power Management version 2 03:01.1 0805: 1180:0822 (rev 19) (prog-if 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 64, IRQ 58 Memory at ef9fd400 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 03:01.2 0880: 1180:0843 (rev 01) Subsystem: 1028:01bd Flags: bus master, medium devsel, latency 0, IRQ 11 Memory at ef9fd500 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 03:01.3 0880: 1180:0592 (rev 0a) Subsystem: 1028:01bd Flags: medium devsel, IRQ 11 Memory at ef9fd600 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 03:01.4 0880: 1180:0852 (rev 05) Subsystem: 1028:01bd Flags: medium devsel, IRQ 11 Memory at ef9fd700 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 0b:00.0 0280: 14e4:4311 (rev 01) Subsystem: 1028:0007 Flags: bus master, fast devsel, latency 0, IRQ 169 Memory at efdfc000 (32-bit, non-prefetchable) [size=16K] Capabilities: [40] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Capabilities: [d0] Express Legacy Endpoint IRQ 0 Capabilities: [100] Advanced Error Reporting Capabilities: [13c] Virtual Channel [EMAIL PROTECTED]:~$ asoundconf list Names of available sound cards: Intel [EMAIL PROTECTED]:~$ cat /etc/asound.conf ~/.asoundrc* cat: /etc/asound.conf: No such file or directory cat: /home/tolmi/.asoundrc*: No such file or directory [EMAIL PROTECTED]:~$ dmesg > dmesg.txt [EMAIL PROTECTED]:~$ sudo cat /proc/interrupts CPU0 CPU1 0: 582890 0 IO-APIC-edge timer 1: 3301 0 IO-APIC-edge i8042 8: 66 0 IO-APIC-edge rtc 9: 2 0 IO-APIC-level acpi 12: 657 0 IO-APIC-edge i8042 14: 62948 0 IO-APIC-edge libata 15: 5876 0 IO-APIC-edge libata 50: 463824 0 IO-APIC-level uhci_hcd:usb4 58: 0 0 IO-APIC-level sdhci:slot0 169: 57076 0 IO-APIC-level ndiswrapper, [EMAIL PROTECTED]:0000:00:02.0 177: 2 0 IO-APIC-level ohci1394 209: 0 0 IO-APIC-level eth0 217: 3 0 IO-APIC-level uhci_hcd:usb1, ehci_hcd:usb5 225: 280 0 IO-APIC-level uhci_hcd:usb2, HDA Intel 233: 106148 0 IO-APIC-level uhci_hcd:usb3 NMI: 0 0 LOC: 582712 582711 ERR: 0 MIS: 0 ** Attachment added: "dmesg of my Dell Inspiron 6400" http://librarian.launchpad.net/6821835/dmesg.txt -- Speakers not muted when headphones are plugged in https://launchpad.net/bugs/37055 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs