Jason C. McDonald

Having the same issue for a map coming from 1.13.2 (originally created in 1.7, I've been upgrading it successfully for years since.) It has regenerated terrain over some of my most important structures, and has actually changed entire biomes.

The problem apparently was resolved in a later system (Java, I believe) or launcher update, so the problem has gone away. If the problem starts again, I'll open a new issue and include launcher_log.txt.

Standard, legit Multiplayer servers only. Nothing cracked, ever.

As to the connection, I can rule that out entirely:

• The computer is connected via a good quality ethernet cable directly to the router. This same connection is used often for HD video chat and live video webcasting, with no disruptions or difficulties.

• I've also tested the computer and Minecraft on the wi-fi connection instead of ethernet, with the same results.

• The router has no packet loss, and full, steady connectivity with no speed drops.

• The other computer, which can connect to Multiplayer games (old launcher, remember?) is on the same internet connection, connected to the same router.

• The internet speed is always upwards of 70Mbps downstream, 15Mbps upstream on wireless, and upwards of 100Mbps downstream, 17Mbps upstream on wired.

• Recall the stats on the ping from that computer to authserver.mojang.com: 100 packets transmitted, 100 received, 0% packet loss, time 99133ms, rtt min/avg/max/mdev = 17.092/48.364/230.986/31.455 ms

In case it matters, this particular machine isn't a low-end used build. It's actually a high-end, custom built desktop computer, primarily purchased for the purpose of professional 3D graphics and video rendering. However, the standard open source graphics drivers are all that are used; no specialty drivers needed.

(Also, it plays Singleplayer Minecraft with no difficulties.)

Okay, I have actually found a workaround for the issue - this might be worth noting for other Linux Mint users.

1. Open 'System Settings' and 'Mouse and Touchpad'
2. Turn OFF "Show position of pointer when the Control key is pressed"

Apparently Minecraft doesn't play well with Linux Mint if this is on, at least since 1.7.10. Technically, that would be a bug on Minecraft's part (thereby confirming this bug, which I'll edit).

@Neko, Hah, well, I know how this goes. I'm a professional programmer too. However, I can insist it indeed does not work for me, and therefore, certainly not "resolved". Difference in OS, prob. What's yours?

I created a Minecraft book containing all of the sound events, for quick reference. The command to give it is at http://pastebin.com/bfdRrsBg

Confirmed on multiplayer server running on Ubuntu 14.04 LTS.

The same thing is going on with my server. It doesn't matter what game mode I'm in. Some plates work, most don't - it appears to be random. I'm on Ubuntu 14.04 and 15w38b.

Confirmed on Ubuntu 14.04. It also appears to correlate with a sudden and inexplicable drop from 14-28FPS to 0-1FPS. I had not added any new redstone or command block stuff when the drop appeared.

Confirmed for 14w31a. We get this a lot, rather randomly. Not much pattern to it, though often it happens when an entity is spawned/summoned (even an arrow). I'm getting annoyingly fast on the server restart, but I had to do it seven times in ten minutes this morning. Oy.

That said, it is always preceded by "Can't keep up" messages, as with the others. For whatever reason, the crashes seem to slow down the more people on my server. Eh??

Same with me for 14w27b. Ubuntu 14.04 "Trusty Tahr", and the world runs just fine on 14w26c, so it isn't that.

Same issue here. Running on 26c until it's resolved. I'm on Ubuntu 14.04 "Trusty Tahr". Not a world issue, 26c runs it fine.

Yup, same issue here. I like to hide my mob spawners under one block, so they don't show in the adventure map. That usually works, but as of 26b, I had mobs spawning into the blocks, many of them suffocating. About half do that. Kinda annoying.

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