bug 191137 - ACPI Embedded Controller (EC) stops boot when kernel boot 'quiet' option is enabled

[TJ]

Could you take a look at the bug report for this one, especially my
analysis:

https://bugs.edge.launchpad.net/linux/+bug/191137/comments/34

It has the potential to affect a *LOT* of systems that are currently
working fine with Gutsy. This affects bootable CDs and installed
systems.

The trigger appears to be a Notify() call in the embedded controller EC
_REG() control method coupled with the early EC init introduce in commit
c04209a7948b95e8c52084e8595e74e9428653d3.

The work-around could be as simple as removing the "quiet" boot option -
not exactly elegant, but doable. 

I have a large collection of DSDTs from across the Vaio range as part of
my SNC research. I ran an analysis script on them to see how many might
be affected:

VGN-AR31S-R0200J6, VGN-AR370E-R0200J6, VGN-C140G-R0030J4, VGN-C1S,
VGN-C1ZB-R0034J4, VGN-C22GH-R0080J4, VGN-C240E-R0080J4, VGN-C2S-R0080J4,
VGN-C2Z-R0080J4, VGN-FE11H-R0072J3, VGN-FE11H-R0074J3,
VGN-FE11M-R0172J3, VGN-FE11M-R0174J3, VGN-FE21H-R0100J3,
VGN-FE21M-R0130J3, VGN-FE31M, VGN-FE31M-R0170J3, VGN-FE41E-R0190J3,
VGN-FE41M-R0190J3, VGN-FE41Z-R0200J3, VGN-FE45G-R0190J3,
VGN-FE550G-R0074J3, VGN-FE590P-R0072J3, VGN-FE660G-R0133J3,
VGN-FE670G-R0130J3, VGN-FE690-R0172J3, VGN-FE770G-R0173J3, VGN-FE830,
VGN-FE870E-R0190J3, VGN-FE880EH-R0200J3, VGN-FS115M-R0104J0,
VGN-FS215B-R0040J1, VGN-FS215E-R0040J1, VGN-FS285H-R0040J1,
VGN-FS315E-R0084J1, VGN-FS315H-R0080J1, VGN-FS315S-R0084J1,
VGN-FS660W-R0044J1, VGN-FS730W-R0080J1, VGN-FS740W-R0080J1,
VGN-FS760W-R0080J1, VGN-FS965F-R0044J2, VGN-FS980-R0044J2,
VGN-FZ11M-R0050J7, VGN-N130G-R0020J4, VGN-N230E-R0070J4,
VGN-N31Z-R0100J4

TJ.