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MC-62958

Massive Visual Glitching with VBOs off and Chunk distance over a level the graphics card cannot handle (Caused by outdated AMD drivers)

Solutions

Update to AMD Catalyst Omega (14.12) (Or later)

Both drivers can be downloaded here.

"Pixel format not accelerated"

If you're receiving this crash after updating to the drivers listed above, then you're experiencing MC-297, and will have to downgrade to the old drivers. Follow the instructions there on how to do so.

Workarounds

There are multiple workarounds that can fix this issue.

You can do any of the following listed below. These might've fixed the issue for some, but not all, people who have this bug.

Recommended:
Turn VBOs ON (Options -> Video Settings -> Use VBOs: ON)
Turn down render distance to an acceptable setting (where it doesn't produce the glitching)

Not Recommended:
Adding -d64 to the JVM arguments for Minecraft
(Example: -d64 -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M)
Assigning more memory (One user has said that they still experience it at about 3.5 GB)

I am unsure of the exact reproduction, however I was exploring a new area of the current seed I am using (-1421103864573832176) and in the upper right corner unexpected chunks started appearing (Repeating).

I can provide my save game if you wish (~50 megs uncompressed).

What I do know:
Appeared in definitely new chunks; however not in all new chunks.
All appear to be at the same height πŸ‘. Chunks appear to be all the exact same from outside;
Definitely not of existing chunks (they are Savanah, however there is no actual Savanah in my world generated yet).
If I am not 'in' the unusual chunks, it shows the correct biome, and it appears like it is simply generating polygons along a certain line of site (I can sail below and if my view angle is offset enough, the chunks disappear.

If I am 'in' the unusual chunks, things get weirder:

  • I can only walk a handful of blocks

  • Biomes reported in the logging are very small (in what is otherwise I single chunk may contain 2 or three biomes)

  • The grass, sky, etc. in the weird chunk will reflect the biome stated in logging, not the actual biome, nor the biome that the weird chunk otherwise appears to be.

My suspicion is it is loading corrupted data. It also wouldn't surprise me if it had some connection to a recent issue I have been seeing where chunks completely fail to generate geometry (I can walk in them fine, however nothing is drawn to screen); or more recently fail to update quickly (e.g. I can mine a few blocks, but it may take a noticable fraction of a second, to several seconds before the change is visually updated).

Linked issues

MC-2984 Water Breathing status does not work on squid Resolved MC-3163 Rail turnout bug Resolved MC-4238 Creeper Spawn Egg Not Spawning Creepers! Resolved MC-4496 Fresh Minecraft install downloads wrong architecture Resolved MC-4589 Whenever I log in it keeps me stuck on updating Resolved

Attachments

Comments 181

This is a pure graphical bug, the chunks/blocks are visually copied over from somewhere else.

August Junkala

As I noted, I don't think it is wholly graphical. There is a place on my map where the elevation is high enough that I can enter the chunks. When I do that the environment (grass colour & sky) changes rapidly between biomes; as well as the biome listed in the log (in F3). Additionally moving through the chunk only works for a handful of blocks before it becomes difficult to move. I would assume that that is just the actual geometry for the block, but movement becomes jittery and sluggish until I move back out.

Additionally, I am not so sure there place in my world that is Savanah for it to have copied from (I often use 16 chunk viewing while exploring and haven't gone beyond the edge of my maps; none of which show any sign of Savanah).

If I have the chance I'll poke around a bit more this evening though, in case there is additional info I can provide.

Just in case someone wanted to see how bad it is: http://youtu.be/Jh4TyCFAeQA ( Epilepsy warning!)

EDIT: Watch the video in HD, I compressed it to hell so that it would upload quickly)

@all:
According to MC-63615 this happens after switching off VBOs.

  • Does it happen with VBOs on ?

  • Does it happen after switching VBOs off, leaving Minecraft and reloading the world ?

August Junkala

I have been playing with VBOs off.

It didn't happen in the most recent session at all, however my game had auto-updated to 30b. When it did happen I did have VBOs off. I'll try again with 29b and see if it happens and try to answers your questions.

On a side note, I was wrong about the Savanah, the new chunks (and the first chunks where I saw the error) are in fact Savanah, so it could definitely have copied from those chunks.

171 more comments
Tyler Bozinovski

I made a bug report, and was told that it was linked to this one. I'll try to fix it.

Tyler Bozinovski

Turned VBOs on. I'm gonna keep it on for now, because it fixed the issue for me.

I have tried turning on my VBO's, and it works like a dream. The only problem that it is preventing the new 'Elytra' item to stop working. Please respond if there is any way to fix this. (1.9.2)

Go use the search function for that, there are a lot of causes the make elytras stop working.

Which is better? MC-62958 or MC-218803?

August Junkala

(Unassigned)

Community Consensus

Minecraft 14w29b, Minecraft 14w30c, Minecraft 14w31a, Minecraft 14w32b, Minecraft 14w32d, ..., Minecraft 1.8-pre1, Minecraft 1.8-pre2, Minecraft 1.8-pre3, Minecraft 1.8, Minecraft 1.8.1-pre3

Minecraft 14w34a

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