Worked this morning, but now getting this same error. Using Ubuntu 14.04. Updated to latest java (1.8.0_152) and renamed ~/.minecraft directory and still getting this error.
Looks like an update occurred on my system in the interim: chromium-codecs-ffmpeg-extra:amd64 62.0.3202.62-0ubuntu0.14.04.1204
After reconstructing the full java command based on what libraries were reported to be needed to be downloaded:
/usr/lib/jvm/jdk1.8.0_152/jre/bin/java -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Djava.library.path=~/.minecraft/versions/17w43a/17w43a-natives-11184470268431 -Dminecraft.launcher.brand=java-minecraft-launcher -Dminecraft.launcher.version=1.6.82-j -cp /.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar:/.minecraft/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar:/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar:/.minecraft/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar:/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.4-nightly-20150209/lwjgl_util-2.9.4-nightly-20150209.jar:/.minecraft/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar:/.minecraft/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar:/.minecraft/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar:/.minecraft/libraries/com/mojang/realms/1.10.17/realms-1.10.17.jar:/.minecraft/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar:/.minecraft/libraries/net/java/jinput/jinput-platform/2.0.5/jinput-platform-2.0.5-natives-linux.jar:/.minecraft/libraries/it/unimi/dsi/fastutil/7.1.0/fastutil-7.1.0.jar:/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar:/.minecraft/libraries/io/netty/netty-all/4.1.9.Final/netty-all-4.1.9.Final.jar:/.minecraft/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar:/.minecraft/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar:/.minecraft/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar:/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl/2.9.4-nightly-20150209/lwjgl-2.9.4-nightly-20150209.jar:/.minecraft/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar:/.minecraft/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar:/.minecraft/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar:/.minecraft/libraries/com/mojang/text2speech/1.10.3/text2speech-1.10.3.jar:/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar:/.minecraft/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar:/.minecraft/libraries/com/mojang/text2speech/1.10.3/text2speech-1.10.3-natives-linux.jar:/.minecraft/libraries/com/mojang/patchy/1.1/patchy-1.1.jar:/.minecraft/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar:/.minecraft/libraries/com/google/guava/guava/21.0/guava-21.0.jar:/.minecraft/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar:/.minecraft/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar:/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl-platform/2.9.4-nightly-20150209/lwjgl-platform-2.9.4-nightly-20150209-natives-linux.jar:/.minecraft/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar:/.minecraft/libraries/com/mojang/authlib/1.5.25/authlib-1.5.25.jar:/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar:~/.minecraft/versions/1.12.2/1.12.2.jar net.minecraft.client.main.Main
Failed with the messages:
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
Exception in thread "main" java.lang.UnsatisfiedLinkError: org.lwjgl.DefaultSysImplementation.getPointerSize()I
at org.lwjgl.DefaultSysImplementation.getPointerSize(Native Method)
at org.lwjgl.Sys.<clinit>(Sys.java:118)
at bib.I(SourceFile:2825)
at net.minecraft.client.main.Main.main(SourceFile:38)