After upgrading to kubuntu 9.10, I have problems with alsa sound.

The problem is going this way:
1st I start amarok, sounds ok.
2nd If I navigate under any page that has video or sound, it does not work, but amarok is still working.
3rd If I stop amarok for any reason, multimedia web pages gain access to alsa and there is sound, but if I try to play musinc under amarok, THERE IT IS, THERE IS NO MUSIC.

I learned how to turn it around? RESTARTING KDE, but it is tedious and sometimes it does not work and then I have to restart the machine.

So under lspci those are the values obtained:
00:00.0 Host bridge: ATI Technologies Inc RD780 Northbridge only dual slot PCI-e_GFX and HT1 K8 part
00:02.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (external gfx0 port A)
00:06.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port C)
00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA
00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0)
00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1)
00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2)
00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3)
00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4)
00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI)
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14)
00:14.1 IDE interface: ATI Technologies Inc SB600 IDE
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control
01:00.0 VGA compatible controller: ATI Technologies Inc RV630 [Radeon HD 2600XT]
01:00.1 Audio device: ATI Technologies Inc RV630/M76 audio device [Radeon HD 2600 Series]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI

It looks like no problem right?

And last subject: Do you recommend me to do what they say under the page:
http://www.howtogeek.com/howto/10964/how-to-fix-sound-issues-in-ubuntu-9.10/

Installing an older version of alsa?

Thanks in advanced [and specially for your patience].

ProblemType: Bug
Architecture: i386
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe9f4000 irq 16'
   Mixer name : 'Realtek ALC888'
   Components : 'HDA:10ec0888,14627388,00100001'
   Controls : 36
   Simple ctrls : 21
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfeaec000 irq 19'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100000'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined
   Playback channels: Mono
   Mono: Playback [on]
Date: Fri Mar 5 12:25:37 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: fglrx
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.57-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-20-generic i686