I can confirm this problem, I have a HP dv5000, my sound can't be controled normally, the only thing that actually affects the volume it's changing the PCM channel volume, the rest doesn't affect the audio at all. So know i set that the volume applet changes the volume of the PCM channel, so my keys can work. But every time I mute my laptop and then restart it, the led in my laptop says that it's not muted, but i can see that in the volume applet it's muted. One last thing is that usually when i muted, what the system does is lower the volume all the way down, so when I unmuted, I also have to set the volume higher. This problem I'm having it's in Ubuntu 8.04 beta, kernel 2.6.24-15-generic. In Ubuntu 7.10 I still had this problem, but I fix it with the drivers from www.linuxant.com, but now since it's a new kernel their drivers don't work anymore. I don't consider the workaround in https://help.ubuntu.com/community/MacBook#head-d374bb9e1b7183c133759a8c6877a34c50c4ba7d usefull, because the system should have the master volume and the PCM volume working apart. If you lower the master, everything should lower, the PCM it's just application related. If any of you are still using Ubuntu 7.10, and have a Conexant sound card, use the driver from: http://www.linuxant.com/drivers/hsf/full/downloads.php My system information is: felipe@felipe-laptop:~$ tail -n1 /proc/asound/oss/sndstat 0: Conexant CX20551 (Waikiki) felipe@felipe-laptop:~$ amixer Simple mixer control 'Master',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 30 Mono: Front Left: Playback 22 [73%] [-13.50dB] [on] Front Right: Playback 22 [73%] [-13.50dB] [on] Simple mixer control 'PCM',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 187 [73%] [-13.60dB] [on] Front Right: Playback 186 [73%] [-13.80dB] [on] Simple mixer control 'Mic Bypass',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 30 Front Left: Capture 0 [0%] [-34.50dB] [off] Front Right: Capture 0 [0%] [-34.50dB] [off] Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Capture',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 14 Front Left: Capture 0 [0%] [0.00dB] [off] Front Right: Capture 0 [0%] [0.00dB] [off] Simple mixer control 'Digital',0 Capabilities: cvolume Capture channels: Front Left - Front Right Limits: Capture 0 - 120 Front Left: Capture 60 [50%] [0.00dB] Front Right: Capture 60 [50%] [0.00dB] Simple mixer control 'ExtMic',0 Capabilities: cswitch cswitch-joined cswitch-exclusive Capture exclusive group: 0 Capture channels: Mono Mono: Capture [on] felipe@felipe-laptop:~$ sudo lspci -nv [sudo] password for felipe: 00:00.0 0600: 8086:27a0 (rev 03) Subsystem: 103c:30a5 Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information 00:01.0 0604: 8086:27a1 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: d0000000-d1ffffff Prefetchable memory behind bridge: 00000000c0000000-00000000cfffffff Capabilities: [88] Subsystem: 103c:30a5 Capabilities: [80] Power Management version 2 Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable- Capabilities: [a0] Express Root Port (Slot+) IRQ 0 00:1b.0 0403: 8086:27d8 (rev 01) Subsystem: 103c:30a5 Flags: bus master, fast devsel, latency 0, IRQ 22 Memory at d2400000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [70] Express Unknown type IRQ 0 00:1c.0 0604: 8086:27d0 (rev 01) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 Capabilities: [40] Express Root Port (Slot+) IRQ 0 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable- Capabilities: [90] Subsystem: 103c:30a5 Capabilities: [a0] Power Management version 2 00:1c.1 0604: 8086:27d2 (rev 01) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 Capabilities: [40] Express Root Port (Slot+) IRQ 0 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable- Capabilities: [90] Subsystem: 103c:30a5 Capabilities: [a0] Power Management version 2 00:1c.2 0604: 8086:27d4 (rev 01) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=06, subordinate=06, sec-latency=0 Memory behind bridge: 50000000-500fffff Capabilities: [40] Express Root Port (Slot+) IRQ 0 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable- Capabilities: [90] Subsystem: 103c:30a5 Capabilities: [a0] Power Management version 2 00:1d.0 0c03: 8086:27c8 (rev 01) (prog-if 00 [UHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at 1800 [size=32] 00:1d.1 0c03: 8086:27c9 (rev 01) (prog-if 00 [UHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 20 I/O ports at 1820 [size=32] 00:1d.2 0c03: 8086:27ca (rev 01) (prog-if 00 [UHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 18 I/O ports at 1840 [size=32] 00:1d.3 0c03: 8086:27cb (rev 01) (prog-if 00 [UHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 16 I/O ports at 1860 [size=32] 00:1d.7 0c03: 8086:27cc (rev 01) (prog-if 20 [EHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 19 Memory at d2404000 (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 [Subtractive decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=08, subordinate=0c, sec-latency=64 I/O behind bridge: 00002000-00002fff Memory behind bridge: d2000000-d20fffff Capabilities: [50] Subsystem: 103c:30a5 00:1f.0 0601: 8086:27b9 (rev 01) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information 00:1f.1 0101: 8086:27df (rev 01) (prog-if 8a [Master SecP PriP]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 0, IRQ 20 I/O ports at 01f0 [size=8] I/O ports at 03f4 [size=1] I/O ports at 0170 [size=8] I/O ports at 0374 [size=1] I/O ports at 1880 [size=16] 00:1f.2 0106: 8086:27c5 (rev 01) (prog-if 01 [AHCI 1.0]) Subsystem: 103c:30a5 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 219 I/O ports at 18c8 [size=8] I/O ports at 18ac [size=4] I/O ports at 18c0 [size=8] I/O ports at 18a8 [size=4] I/O ports at 18b0 [size=16] Memory at d2404400 (32-bit, non-prefetchable) [size=1K] Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable+ Capabilities: [70] Power Management version 2 00:1f.3 0c05: 8086:27da (rev 01) Subsystem: 103c:30a5 Flags: medium devsel, IRQ 10 I/O ports at 18e0 [size=32] 01:00.0 0300: 10de:01d8 (rev a1) (prog-if 00 [VGA controller]) Subsystem: 103c:30a5 Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at d1000000 (32-bit, non-prefetchable) [size=16M] Memory at c0000000 (64-bit, prefetchable) [size=256M] Memory at d0000000 (64-bit, non-prefetchable) [size=16M] Capabilities: [60] Power Management version 2 Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [78] Express Endpoint IRQ 0 06:00.0 0280: 8086:4222 (rev 02) Subsystem: 103c:135b Flags: bus master, fast devsel, latency 0, IRQ 218 Memory at 50000000 (32-bit, non-prefetchable) [size=4K] Capabilities: [c8] Power Management version 2 Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+ Capabilities: [e0] Express Legacy Endpoint IRQ 0 08:06.0 0607: 104c:8039 Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 168, IRQ 18 Memory at d2004000 (32-bit, non-prefetchable) [size=4K] Bus: primary=08, secondary=09, subordinate=0c, sec-latency=176 Memory window 0: 54000000-57fff000 (prefetchable) Memory window 1: 58000000-5bfff000 I/O window 0: 00002400-000024ff I/O window 1: 00002800-000028ff 16-bit legacy interface ports at 0001 08:06.1 0c00: 104c:803a (prog-if 10 [OHCI]) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 64, IRQ 20 Memory at d2007000 (32-bit, non-prefetchable) [size=2K] Memory at d2000000 (32-bit, non-prefetchable) [size=16K] Capabilities: [44] Power Management version 2 08:06.2 0180: 104c:803b Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 64, IRQ 22 Memory at d2005000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 08:06.3 0805: 104c:803c Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 64, IRQ 21 Memory at d2007800 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 08:08.0 0200: 8086:1092 (rev 01) Subsystem: 103c:30a5 Flags: bus master, medium devsel, latency 66, IRQ 21 Memory at d2006000 (32-bit, non-prefetchable) [size=4K] I/O ports at 2000 [size=64] Capabilities: [dc] Power Management version 2 felipe@felipe-laptop:~$ asoundconf list Names of available sound cards: Intel felipe@felipe-laptop:~$ cat /proc/interrupts CPU0 CPU1 0: 772712 0 IO-APIC-edge timer 1: 3925 0 IO-APIC-edge i8042 8: 7 0 IO-APIC-edge rtc 9: 15926 0 IO-APIC-fasteoi acpi 12: 425551 0 IO-APIC-edge i8042 14: 19602 0 IO-APIC-edge libata 15: 0 0 IO-APIC-edge libata 16: 294132 0 IO-APIC-fasteoi uhci_hcd:usb4, nvidia 18: 1 0 IO-APIC-fasteoi uhci_hcd:usb3, yenta 19: 2 0 IO-APIC-fasteoi uhci_hcd:usb1, ehci_hcd:usb5 20: 1 0 IO-APIC-fasteoi uhci_hcd:usb2, ohci1394 21: 893 0 IO-APIC-fasteoi sdhci:slot0, eth0 22: 812 0 IO-APIC-fasteoi tifm_7xx1, HDA Intel 218: 83739 0 PCI-MSI-edge iwl3945 219: 49252 0 PCI-MSI-edge ahci NMI: 0 0 Non-maskable interrupts LOC: 156467 454716 Local timer interrupts RES: 534237 604797 Rescheduling interrupts CAL: 191 328 function call interrupts TLB: 1880 3160 TLB shootdowns TRM: 0 0 Thermal event interrupts SPU: 0 0 Spurious interrupts ERR: 0 MIS: 0