** Description changed: + [Impact] + + * IGLX is a way for an opengl application sending the 3D drawing GLX + commands to the Xorg server for rendering instead of using the DRI + infrastructure it is commonplace for High Performance Compute and + Scientific institutions to use this feature of the Xorg server. (ref: + https://www.phoronix.com/scan.php?page=news_item&px=Xorg-IGLX-Potential- + Bye-Bye) + + * The feature is completely broken, currently, and any attempt to use + it will cause the Xorg server to crash. This feature has been broken + since a commit upstream in 2016. + + * The attached patch is from the revert commit entered into the + upstream repository on 28 Jan 2020 following a git bisect of the bug + discovering the offending commit. + + [Test Case] + + * Create a new file at /etc/X11/xorg.conf.d/99-IGLX.conf with the + following contents: + + ``` + Section "ServerFlags" + Option "IndirectGLX" "on" + EndSection + ``` + + * Log out of your Xorg session + * Switch to a VT (Ctrl+Alt+F2) and login + * Run `sudo systemctl restart gdm` to restart Xorg + * Login to the graphical session + * If you do not have mesa-utils installed, then install it with the terminal command `sudo apt install mesa-utils` + * Open a terminal and execute `LIBGL_ALWAYS_INDIRECT=1 glxgears` + * If the fix is successful then glxgears should start and remain active without the Xorg server or glxgears crashing/segfaulting + + [Regression Potential] + + * This change is within DRI-related functionality and so might break + all 3D accelerated applications. + + * There is a potential that the change is insufficient to fix the IGLX + feature and so attempts to use it may still have undesirable and + undefined results. + + * Upstream has run the patch through their CI system, which passed with no errors. This does not necessarily mean the patch will achieve the desired results, but at least indicates that the code does compile cleanly and can start an Xvfb headless instance. + + [Other Info] + + ---- Original Bug Report Follows ---- + There's already an upstream bug report here: https://bugs.freedesktop.org/show_bug.cgi?id=99555 Basically, with Option "IndirectGLX" "True" and LIBGL_ALWAYS_INDIRECT=1 I get immediate crashes e.g. with glxgear: - steved@xubuntu:~$ LIBGL_ALWAYS_INDIRECT=true glxgears + steved@xubuntu:~$ LIBGL_ALWAYS_INDIRECT=true glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. X Error of failed request: 255 - Major opcode of failed request: 155 (GLX) - Minor opcode of failed request: 1 (X_GLXRender) - Serial number of failed request: 42 - Current serial number in output stream: 936 + Major opcode of failed request: 155 (GLX) + Minor opcode of failed request: 1 (X_GLXRender) + Serial number of failed request: 42 + Current serial number in output stream: 936 I am trying to run what is effectively a traditional X Terminal, but as the hardware I am using has a 3D accelerated chipset it seems sensible to try to use it.. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-core 2:1.19.6-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' Date: Tue Jun 12 10:09:30 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: - rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-22-generic, x86_64: installed - rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-23-generic, x86_64: installed + rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-22-generic, x86_64: installed + rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-23-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: - Intel Corporation Device [8086:5a85] (rev 0b) (prog-if 00 [VGA controller]) - Subsystem: Intel Corporation Device [8086:2212] + Intel Corporation Device [8086:5a85] (rev 0b) (prog-if 00 [VGA controller]) + Subsystem: Intel Corporation Device [8086:2212] InstallationDate: Installed on 2018-05-31 (11 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: AZW S I ProcEnviron: - TERM=xterm - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_GB.UTF-8 - SHELL=/bin/bash + TERM=xterm + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_GB.UTF-8 + SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=/dev/mapper/xubuntu--vg-root ro noresume SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/18/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 00.12 dmi.board.asset.tag: Default string dmi.board.name: AB1 dmi.board.vendor: IP3 Tech dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 35 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr00.12:bd12/18/2017:svnAZW:pnSI:pvrDefaultstring:rvnIP3Tech:rnAB1:rvrDefaultstring:cvnDefaultstring:ct35:cvrDefaultstring: dmi.product.family: Mini PC dmi.product.name: S I dmi.product.version: Default string dmi.sys.vendor: AZW version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
** Description changed: [Impact] - * IGLX is a way for an opengl application sending the 3D drawing GLX + * IGLX is a way for an opengl application sending the 3D drawing GLX commands to the Xorg server for rendering instead of using the DRI infrastructure it is commonplace for High Performance Compute and Scientific institutions to use this feature of the Xorg server. (ref: https://www.phoronix.com/scan.php?page=news_item&px=Xorg-IGLX-Potential- Bye-Bye) - * The feature is completely broken, currently, and any attempt to use + * The feature is completely broken, currently, and any attempt to use it will cause the Xorg server to crash. This feature has been broken since a commit upstream in 2016. - * The attached patch is from the revert commit entered into the + * The attached patch is from the revert commit entered into the upstream repository on 28 Jan 2020 following a git bisect of the bug discovering the offending commit. [Test Case] - * Create a new file at /etc/X11/xorg.conf.d/99-IGLX.conf with the + * Create a new file at /etc/X11/xorg.conf.d/99-IGLX.conf with the following contents: ``` Section "ServerFlags" - Option "IndirectGLX" "on" + Option "IndirectGLX" "on" EndSection ``` - * Log out of your Xorg session - * Switch to a VT (Ctrl+Alt+F2) and login - * Run `sudo systemctl restart gdm` to restart Xorg - * Login to the graphical session - * If you do not have mesa-utils installed, then install it with the terminal command `sudo apt install mesa-utils` - * Open a terminal and execute `LIBGL_ALWAYS_INDIRECT=1 glxgears` - * If the fix is successful then glxgears should start and remain active without the Xorg server or glxgears crashing/segfaulting + * Log out of your Xorg session + * Switch to a VT (Ctrl+Alt+F2) and login + * Run `sudo systemctl restart gdm` to restart Xorg + * Login to the graphical session + * If you do not have mesa-utils installed, then install it with the terminal command `sudo apt install mesa-utils` + * Open a terminal and execute `LIBGL_ALWAYS_INDIRECT=1 glxgears` + * If the fix is successful then glxgears should start and remain active without the Xorg server or glxgears crashing/segfaulting [Regression Potential] - * This change is within DRI-related functionality and so might break + * This change is within DRI-related functionality and so might break all 3D accelerated applications. - * There is a potential that the change is insufficient to fix the IGLX + * There is a potential that the change is insufficient to fix the IGLX feature and so attempts to use it may still have undesirable and undefined results. - * Upstream has run the patch through their CI system, which passed with no errors. This does not necessarily mean the patch will achieve the desired results, but at least indicates that the code does compile cleanly and can start an Xvfb headless instance. - + * Upstream has run the patch through their CI system, which passed with + no errors. This does not necessarily mean the patch will achieve the + desired results, but at least indicates that the code does compile + cleanly and can start an Xvfb headless instance. + [Other Info] + + * This bug affects Ubuntu releases all the way back to, and including, + Xenial 16.04. ---- Original Bug Report Follows ---- There's already an upstream bug report here: https://bugs.freedesktop.org/show_bug.cgi?id=99555 Basically, with Option "IndirectGLX" "True" and LIBGL_ALWAYS_INDIRECT=1 I get immediate crashes e.g. with glxgear: steved@xubuntu:~$ LIBGL_ALWAYS_INDIRECT=true glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. X Error of failed request: 255 Major opcode of failed request: 155 (GLX) Minor opcode of failed request: 1 (X_GLXRender) Serial number of failed request: 42 Current serial number in output stream: 936 I am trying to run what is effectively a traditional X Terminal, but as the hardware I am using has a 3D accelerated chipset it seems sensible to try to use it.. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-core 2:1.19.6-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' Date: Tue Jun 12 10:09:30 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-22-generic, x86_64: installed rtl8812au, 4.3.8.12175.20140902+dfsg, 4.15.0-23-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Device [8086:5a85] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Intel Corporation Device [8086:2212] InstallationDate: Installed on 2018-05-31 (11 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: AZW S I ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=/dev/mapper/xubuntu--vg-root ro noresume SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/18/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 00.12 dmi.board.asset.tag: Default string dmi.board.name: AB1 dmi.board.vendor: IP3 Tech dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 35 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr00.12:bd12/18/2017:svnAZW:pnSI:pvrDefaultstring:rvnIP3Tech:rnAB1:rvrDefaultstring:cvnDefaultstring:ct35:cvrDefaultstring: dmi.product.family: Mini PC dmi.product.name: S I dmi.product.version: Default string dmi.sys.vendor: AZW version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1776447 Title: Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl programms to crash To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1776447/+subscriptions _______________________________________________ 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
