https://bugzilla.kernel.org/show_bug.cgi?id=32862





--- Comment #18 from Lee, Chun-Yi <[email protected]>  2011-05-01 16:55:34 ---
(In reply to comment #16)
> Hmm, actually, I just spontaneously experienced the bug again, with the patch.
> It turns out that not supplying the -1 values on initialization only fixed the
> most obvious case (that was making the EC lock up *always* as soon as acer-wmi
> is loaded).
> 

I thought "not-allow-negative-number" patch will be better include to next
acer-wmi, it can avoid acer-wmi driver send bad number to BIOS/EC.

> I did some testing and it turns out that making any changes to the threeg file
> or rfkill3 (which is acer-threeg) will trigger the problem, so in fact the
> problem was making the threeg call on boot at all, not the -1 value in
> particular. It's worth noting that this laptop doesn't have a 3G modem at all.
> So I guess something decided to set the rfkills and that triggered the bug
> again.

Thank's for your information.

That means we need find out another way to detect there have 3G modem or not,
unfortunately I only know one way is check "type aa in dmi" and I already
implemented in acer-wmi, looks like Acer 8930G have no "type aa" in dmi.

I thought your machine have wifi and bluetooth, but doesn't have internal 3G
module.
Could you please help attach dmi_decode on this bug?
 - dmidecode > dmidecode.log

If you have time, I appreciate you can help:
 - Remove wifi module then dump "dmidecode > dmidecode_without_wifi.log"
 - Remove bluetooth module then dump "dmidecode > dmidecode_without_bt.log"

Then we can compare the above dmidecode log, if we are LUCKY then we can find
out another "OEM-specific Type" like "type aa" that is mapping to devices exist
state.

Of course we still don't know which bit represent 3G modem, the original
acer-wmi design is enable 3G capability by default, I thought we need disable
it until we find out a way to detect internal 3G device exist or not.

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