I did some bit of uneducated debugging. It seems there is something going on with the GL/GLX and alpha bits.
The LWJGL code is creating a GLX window for its content. I noticed that the screen displaying the logo on startup was entirely translucent, without the 256x256 block in the lower left corner that is not translucent later on. Changing a "glClearColor(0, 0, 0, 0);" to "glClearColor(0, 0, 0, 1);" makes the logo screen not translucent (and any value between 0 and 1 for the alpha value makes it somewhere in-between). - i.e. using glClearColor(0, 0, 0, 1); makes at least the logo screen look the way it should be! Now, it seems Minecraft is only using that code path for the logo and not for the rest of the game. Now I am wondering if "0" for the alpha means translucend and "1" means solid or if it's supposed to be the other way around. Also, I am wondering if the game is expecting that the alpha value on the window has any meaning at all or if there is some hidden flag somewhere that tells the compositing manager what to do with that alpha bit and something is wrong in there. (?) Maybe Minecraft/LWJGL is selecting a visual where it expects the alpha bit to be ignored and chooses the wrong one - but this is a random guess as I really don't know much about GLX and the setup procedure of windows/visuals and how the alpha information is passed down to the compositor. Maybe someone with more knowledge could point me into the right direction... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1277905 Title: Game windows (minecraft, titan attacks, maybe others) on Intel are transparent and no longer playable Status in “xserver-xorg-video-intel” package in Ubuntu: Confirmed Bug description: Fully up to date Trusty. Open Minecraft, notice that the window is transparent - you can see through to the desktop wallpaper, making the game unplayable. Also tested with Titan Attacks which is also a lwjgl based game - dunno if that's coincidence This worked a few days ago. Probably before the most recent xorg update. See screenshots. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xserver-xorg-video-intel 2:2.99.909-0ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-7.25-generic 3.13.1 Uname: Linux 3.13.0-7-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,grid,imgpng,gnomecompat,scale,workarounds,mousepoll,regex,wall,move,place,vpswitch,resize,unitymtgrabhandles,snap,session,expo,ezoom,unityshell] CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Sat Feb 8 10:54:09 2014 DistUpgraded: 2014-01-20 08:54:25,315 DEBUG enabling apt cron job DistroCodename: trusty DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:21da] InstallationDate: Installed on 2012-06-29 (588 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 4287CTO ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-7-generic root=UUID=6088859e-4fc3-4ec8-903f-5b52cdc1d0eb ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: Upgraded to trusty on 2014-01-20 (19 days ago) dmi.bios.date: 12/05/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET67WW (1.37 ) dmi.board.asset.tag: Not Available dmi.board.name: 4287CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET67WW(1.37):bd12/05/2012:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4287CTO dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu4 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.0.1-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.0.1-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.909-0ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Sat Feb 8 10:50:45 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 728 vendor LGD xserver.version: 2:1.15.0-1ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1277905/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
