I have a somewhat similar tale to tell. I suspect it's more a problem with Optifine than it is the texturepack I use, but I do know that Optifine_1.4.6_D5 doesn't play that nice with Ultimate pack 1.0.1, at least on my card (ATI HD3450, using fglrx driver) and OS (Ubuntu 12.10). For example, I start up the launcher, go into Ultimate and make sure that Optifine is in the JarMods folder, then I start Ultimate up, go into Texture Packs, make sure default texture pack is selected, then click Done. Once that happens, the console shows the client dying from a failure in the external renderer in libdri.so. Wonderful.
It also happens if I change texture packs to faithful32 (the FTB Ultimate pack variant) before I install optifine, then I install optifine, restart ultimate, start up my singleplayer world, and open a iron chest. Boom, dead.
Wonderful.
(Post 4)
You need to set optifine chunloading to Multicore and advanced openGL to fast and turn of threading in the graphics card interface panel. That is what fixed it for me [DOUBLEPOST=1365728357][/DOUBLEPOST]
Whenever I open FTB after installing OptiFine_1.4.6_HD_U_D5, Minecraft goes black and it just stays there. I added Optifine last after everything and there was not META folder to begin with. Any suggestions?
Did you install it into the jar mod section?[DOUBLEPOST=1365728473][/DOUBLEPOST]Also Smenes can you find textures for power converters? As they do not seem to available! Thanks!