[Bug 16370] New: Problem with VIA Technologies Inc. VT1720/24 [Envy2 4PT/HT]

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Ubuntu | linux

           Summary: Problem with VIA Technologies Inc. VT1720/24 [Envy2
                    4PT/HT]
           Product: Ubuntu
           Version: unspecified
          Platform: i386
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: linux
        AssignedTo: ben.collins at ubuntu.com
        ReportedBy: jensen at mermaidconsulting.com
         QAContact: kernel-bugs at lists.ubuntu.com


This is a direct copy of bug #9734 that was fixed some time ago. The problem
does however still exist on my platform (not running a shuttlepc like the other
bug, but using the same soundcard). Soundcard is VIA Technologies Inc. VT1720/24
[Envy2 4PT/HT] onboard audio on a Chaintech 9cjs w/P4.

I keep on fixing this bug after each kernel update. I just updated the kernel to
2.6.10-5-686 #1 Fri Sep 23 14:18:02 UTC 2005 i686 GNU/Linux and the problem
cropped up again. Identical to bug #9734 it seems to be a problem with some ID
number and the solution is editing the file: 
/usr/src/linux/sound/pci/ice1712/vt1720_mobo.h. If I am not mistaken this is the
sound driver ice1724 that contains an invalid reference just like for the other
bug. 

To fix this problem I, more or less, follow the instructions here:
http://www.nakack.net/?p=19

root at jensen:/home/jensen # lspci -d 1412:1724 -nvx
0000:03:02.0 0401: 1412:1724 (rev 01)
        Subsystem: 270f:2723
        Flags: bus master, medium devsel, latency 32, IRQ 11
        I/O ports at a400 [size=32]
        I/O ports at a800 [size=128]
        Capabilities: [80] Power Management version 1
00: 12 14 24 17 05 00 10 02 01 00 01 04 00 20 00 00
10: 01 a4 00 00 01 a8 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 0f 27 23 27
30: 00 00 00 00 80 00 00 00 00 00 00 00 0b 01 00 00

I then edit the file sound/pci/ice1712/vt1720_mobo.h where I find 

#define VT1720_SUBDEVICE_ZNF3_150 0x0f2745f6

And replace it with

#define VT1720_SUBDEVICE_ZNF3_150 0x0f272327

I then recompile the module and reboot the machine and voila I have working sound. 

I know the info above is not very helpful, but I'm a really big newbie when it
comes to all this linux stuff. There is also a thread on the forums where I
outline in detail what to do to sort this problem - but unfortunately the forums
seems to be down at the moment. I'll try to post a link when they are up again.

Please let me know if there is anything you need me to do.

Regards

/Martin

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