I been trying to answer this question discrete GPU not working after update, But when i press Post your Answer, Its posting as an comment, I have tried several times but still the same
Please have look at this video http://youtu.be/gRz6qtq19yw
From the comments looks like you are trying to post:
"Have a look at my answer 'answer link here'".
Notice the text "Trivial answer converted to comment".
If you believe this answers the question you could post a overview of what the answer is. Extra info related to the specific question, or if the answers are exact maybe the question is a duplicate.
Anyway, such a short answer gets auto converted - If you believe such an answer is necessary you can "trick" the system with a hidden message such as this: : can only be seen in edit, between those marks. Use extreme caution as I would not recommend that for your "comment", making that into an answer would probably get downvoted, commented as a link only answer question, etc.
Your answer was too short (it really should have been a comment) that the system auto converted it. Notice the text under the comment:
Trivial answer converted to comment