Public bug reported: Binary package hint: xserver-xorg-video-intel
The bug is what it says on the tin. When glutCreateWindow() is called in the attached OpenGL program, the random number generator appears to be reseeded with a predictable number. This results in predictable output unless srand(time(NULL)) called again. This appears to be an Intel driver specific bug; when the program was tested on an Nvidia card in a Linux distro running a similar version of freeglut there was no reseeding. $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) $ lsb_release -rd Description: Ubuntu karmic (development branch) Release: 9.10 $ apt-cache policy xserver-xorg-video-intel xserver-xorg-video-intel: Installed: 2:2.8.1-1ubuntu1 Candidate: 2:2.8.1-1ubuntu1 Version table: *** 2:2.8.1-1ubuntu1 0 500 http://us.archive.ubuntu.com karmic/main Packages 100 /var/lib/dpkg/status ProblemType: Bug Architecture: amd64 Date: Sun Aug 30 16:43:21 2009 DistroRelease: Ubuntu 9.10 MachineType: Dell Inc. Vostro1510 NonfreeKernelModules: wl Package: xserver-xorg-video-intel 2:2.8.1-1ubuntu1 PccardctlIdent: PccardctlStatus: ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-8-generic root=UUID=e183b92c-5171-4a2f-8883-fde441cfe962 ro quiet splash ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-8.28-generic RelatedPackageVersions: xserver-xorg 1:7.4+3ubuntu5 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu3 libdrm2 2.4.12+git20090801.45078630-0ubuntu1 xserver-xorg-video-intel 2:2.8.1-1ubuntu1 xserver-xorg-video-ati 1:6.12.99+git20090629.f39cafc5-0ubuntu6 SourcePackage: xserver-xorg-video-intel Uname: Linux 2.6.31-8-generic x86_64 XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf' dmi.bios.date: 07/10/2008 dmi.bios.vendor: Dell Inc. dmi.bios.version: A10 dmi.board.name: 0M277C dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: N/A dmi.modalias: dmi:bvnDellInc.:bvrA10:bd07/10/2008:svnDellInc.:pnVostro1510:pvrNull:rvnDellInc.:rn0M277C:rvr:cvnDellInc.:ct8:cvrN/A: dmi.product.name: Vostro1510 dmi.product.version: Null dmi.sys.vendor: Dell Inc. fglrx: Not loaded system: distro: Ubuntu architecture: x86_64kernel: 2.6.31-8-generic ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug intel karmic -- Using glutCreateWindow() seeds RNG with predictable value https://bugs.launchpad.net/bugs/421651 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp