Sound / power management problems

[Albert Charron]

Hi everyone.

I have a Dell Latitude C600 laptop.  This machine dual boots Feisty and 
XP (this doesn't matter to my problem in fact...)

The problem I have is the following.  If I leave the machine alone for a 
while (let's say for lunch time), when I come back, I have no sound at 
all.  I can't play music through Rhythmbox or Banshee.  I found that 
restarting alsa-utils solve the problem.

The problem happens only if the machine idles for a while (no music 
playing, no web browsing... just idling).  If I I leave banshee or 
Rythmbox playing musing during lunch time, everything is fine.

This is probably related to power management, but I don't know what to 
look to solve the problem...

In case this is information is important, here's the result of lspci:

00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host 
bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP 
bridge (rev 03)
00:03.0 CardBus bridge: Texas Instruments PCI1420
00:03.1 CardBus bridge: Texas Instruments PCI1420
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:08.0 Multimedia audio controller: ESS Technology ES1983S Maestro-3i 
PCI Audio Accelerator (rev 10)
00:10.0 Ethernet controller: 3Com Corporation 3c556 Hurricane CardBus 
[Cyclone] (rev 10)
00:10.1 Communication controller: 3Com Corporation Mini PCI 56k Winmodem 
(rev 10)
01:00.0 VGA compatible controller: ATI Technologies Inc Rage Mobility M3 
AGP 2x (rev 02)
06:00.0 Ethernet controller: Atheros Communications, Inc. AR5212 
802.11abg NIC (rev 01)

Is there a way to solve this problem or should I stick with restarting 
the service when the problem occurs?

BTW, I seem to have some other problems related to power management... 
for example: system never restarts correctly after "suspend to ram" 
(suspend) or "suspend to disk" (hibernate). 

-- 
+--------------------------------------+
  Albert Charron
+--------------------------------------+
  Linux Counter member #157482
  Registered computers: 195048, 361906
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