FTB Launcher fails to launch all packs

[EyeOfTack]

Title:

FTB Launcher fails to launch all packs​

Launcher Version:

1.4.7​

Modpack:

all (Infinity)​

Modpack Version:

latest​

Log Link:

http://paste.feed-the-beast.com/view/3c7ed26e​

Details of the issue:

I can't launch FTB Infinity (or any other pack) through the FTB Launcher, the downloaded Infinity pack works just fine when launched with MultiMC.

the issue seems to be around:
[main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
*blah-blah* snip
[main/ERROR] [LaunchWrapper]: Unable to launch

but I have no idea what wrapped minecraft is, or why it's unable to launch.

What I've tried so far: (running Ubuntu 14.04)
Reinstall FTB Launcher
Reinstall Minecraft
Reinstall Java - (openjdk 7, oracle 7, and oracle 8)
Reinstall graphics drivers
Reinstall entire operating system followed by all of the above. (I got a little upset with my day when that didn't fix it)

Any ideas what is going on? It would be nice to know what's wrong.​

 

[idjmleader]

By any chance if you are running windows 7 again did you update to the latest updates? Also what is your PC specs

 

[EyeOfTack]

I'm running on Ubuntu Linux, and it has work on the machine before (and still does, just no longer through the FTB Launcher).
It's a laptop:
Intel Core i7 4702MQ
12 GB RAM
HDD
Geforce gt750m 4GB (using nvidia's drivers)
Extra monitor connected by vga

 

[EyeOfTack]

sorry for reviving this, but I found the problem and wanted to share.

I deleted and reinstalled my vanilla installation and everything worked fine after that. (I guess I didn't before or didn't delete it properly or used an old installer)

Because I could load ftb pakcs using MultiMC I was convinced the problem was with the FTB Launcher - clearly I was wrong.

Have a nice day.