my Hexxit wont start

[twig1233]

i run linux:ubuntu and i was playing with my freinds on Hexxit then it crashed when i tryed to make golden fathers, wen we(note the entire server crashed) restarted they rejoined just fine however i get the error

Could not locate symbol glXSwapIntervalEXT

Could not locate symbol glXEnumerateVideoDevicesNV

Could not locate symbol glXBindVideoCaptureDeviceNV

ny of the mod packs (and i have reinstalled the whole thing (x2) so plz help

its not just hexxit its a

and then it displays the mojang loading screen for 2+ hours and dosent load hexxit

even tho i have deletet all files and reinstalled them

any help??

(i apolgise for the grammer and speelling im dislexic)

[twig1233]

i have since restarted and nothing still works(iv been trying to run it for the past 4 hours an all it still displays is the mojang screen)