Comment 884 for bug 1958019

(In reply to Gergo K from comment #865)
> Please try 0x38 instead of 0x70, and if still not found, try 0,1,2,4 instead
> of bus 3.
>
> If you still not found, please send your acpidump output.

# i2cset -y 1 0x38 0x7f 0x00
Error: Write failed
# i2cset -y 2 0x38 0x7f 0x00
# i2cset -y 2 0x38 0x00 0x00
# i2cset -y 2 0x38 0x7f 0x00
# i2cdump -y 2 0x38
No size specified (using byte-data access)
     0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 02 28 21 41 00 20 09 02 2a 28 10 93 02 00 ..?(!A. ??*(???.
10: 84 00 00 08 0a 00 44 80 00 8d 00 62 36 40 00 01 ?..??.D?.?.b6@.?
20: 2e 14 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .?..............
30: 00 00 00 00 06 bd ad a8 00 00 00 fc bb dd ff ff ....????...???..
40: f6 14 00 00 80 80 00 00 00 00 02 99 80 00 1c 00 ??..??....???.?.
50: 00 00 a2 78 85 13 78 ff c7 c8 40 88 d9 81 00 00 ..?x??x.??@???..
60: 21 08 3c 48 84 88 b2 00 04 09 12 7b 00 1a 03 00 !?<H???.???{.??.
70: 96 02 00 08 00 e0 00 00 00 00 20 00 a0 00 74 00 ??.?.?.... .?.t.
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Above is after the sound is broken.

Immediately after doing the above, where sound is working, and then re-dump
# modprobe snd_hda_scodec_tas2781_i2c
# rmmod snd_hda_scodec_tas2781_i2c
# i2cset -y 2 0x38 0x00 0x00
# i2cset -y 2 0x38 0x7f 0x00
# i2cdump -y 2 0x38

Results in the exact same output.