I am using Ubuntu 15.04 on a old Dell Inspiron 640m with up to date Intel HD graphics and Mesa/open GL. I don't have around 30 FPS with optimised settings and I'm using optifine. Strange forms appear when I use Minecraft
1 Answer
Run sudo apt-get remove oracle-java8 oracle-java8-installer
and then sudo apt-get install openjdk-7-jdk
. This will remove Oracle's Java and install OpenJDK, which is a little more stable and, I believe, is under more development.
sudo apt-get remove oracle-java8 oracle-java8-installer
thensudo apt-get install openjdk-7-jdk