Torches

[kid]

it seems by zelks post that you cannot coup a troll with a sword (none leathal for him)
But you could with 1 poiint of acid/fire damage give a coup de grace blow. (though the troll should get a save a might pass it with just 1 leahtal point of damage. but with them regenegating fire and acid too that seems a good comprimise)

having them not regentate from fire/acid damage would be nice. Having them die just with sword blows seems wrong and does not seem to sit well with the rules you've quated.

So... bottom line you would need:

full fire/acid damage.

Or

Render troll unconcious and have him fail as save as you try to coup de grace him with X point of acid/fire damage which would determaine the DC he should pass.

You could not kill a troll with a sword no matter how much you chop at him or how well.

(though I guess you could allway try and cage him and starve him? or drag him to the river and drown it?)

[Castano]

the way I have seen troll described is their severed parts reform themselves or they sprout into new full trolls. The monster compendium will have the rules for troll killing.

[t-ice]

This discussion starts to remind me of Nethack! Just eat it! Unless it's a undead troll...

Two things seem somewhat unclear based on the SRD description:
Whether a coup de grace with a torch (1 fire damage) will result to a save-or-die of DC11, or whether the DC incorporates all damage (full damage critical hit), long as at least one point of it is fire.
Can you coup-de-grace with a touch attack (acid flask, alchemist fire, weapon-like spells ( like acid splash))? And what about other spells (like burning hands)?

Though for personal preference I have to say I rather like the nwn2 implementation, which seems to pretty well coincide with the 4e Well, perhaps coming back to life with full hp is a bit much, but PCs having to prepare against trolls with some means of acid or fire (other than the common torch) just makes for more interesting options.

[Zelknolf]

Two things seem somewhat unclear based on the SRD description:
Whether a coup de grace with a torch (1 fire damage) will result to a save-or-die of DC11, or whether the DC incorporates all damage (full damage critical hit), long as at least one point of it is fire.
Can you coup-de-grace with a touch attack (acid flask, alchemist fire, weapon-like spells ( like acid splash))? And what about other spells (like burning hands)?

One would need to rummage for more stuff, but the cliff's notes are:
Damage and Nonlethal Damage are totally distinct mechanics, even though their names are similar enough to cause confusion.
Acid flasks and alchemist's fire are grenadelikes, and have special rules for resolving their associated rolls.
Weaponlike spells are weapons for most rules-ey purposes, with melee touch behaving as a melee weapon and ranged touch behaving like a ranged weapon (that is, your held charge of inflict light wounds threatens space, and you can ready it against a charge, perform an attack of opportunity with it, flank with it, critically hit with it, etc -- but your held charge of lesser orb of acid is only capable of crits and distance) with the major departure being that the attack of opportunity comes at the cast event, and delivering a touch doesn't provoke one unless you deliver it with an unarmed strike without needful feats. (by the way, sacred fist is cooler in PnP because they can deliver their attack spells with jumpkicks).

[AcadiusLost]

the way I have seen troll described is their severed parts reform themselves or they sprout into new full trolls. The monster compendium will have the rules for troll killing.

I think I know what you're thinking of there (Moonshaes' "Druid Queen" novel), but I think that was mostly due to use of an artifact/plot device doing the severing (Silvershaft axe), otherwise there would be a LOT more trolls around Faerun. Normally I believe the "main body" heals/regenerates, but the severed appendage does not.

[Castano]

the way I have seen troll described is their severed parts reform themselves or they sprout into new full trolls. The monster compendium will have the rules for troll killing.

I think I know what you're thinking of there (Moonshaes' "Druid Queen" novel), but I think that was mostly due to use of an artifact/plot device doing the severing (Silvershaft axe), otherwise there would be a LOT more trolls around Faerun. Normally I believe the "main body" heals/regenerates, but the severed appendage does not.

It was from some Salvatore novel where Nesme was beset by them iirc. Obv. the DnD source books count first.

[Stormseeker]

Book two of the Icewind dale triology i think was the name of the book.