Public bug reported: As of Ubuntu 20.04, on intel graphics with intel driver (not modesetting), I got segfault whenever anything tries to use GL.
This happens unless I export MESA_LOADER_DRIVER_OVERRIDE=i965. One says that it does not happen with modesetting driver. (gdb) run Starting program: /usr/bin/glxgears [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff17cf700 (LWP 97070)] [New Thread 0x7fffebfff700 (LWP 97071)] [New Thread 0x7ffff0fce700 (LWP 97072)] [New Thread 0x7fffeb7fe700 (LWP 97073)] Thread 1 "glxgears" received signal SIGSEGV, Segmentation fault. 0x00007ffff6a7e1d4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (gdb) where #0 0x00007ffff6a7e1d4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #1 0x00007ffff6c42de4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #2 0x00007ffff6a59e5d in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #3 0x00007ffff6a5aa95 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007ffff6099774 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x000055555555711e in ?? () #6 0x0000555555556c88 in ?? () #7 0x00007ffff7ace0b3 in __libc_start_main (main=0x555555556410, argc=1, argv=0x7fffffffe698, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe688) at ../csu/libc-start.c:308 #8 0x0000555555556f0a in ?? () (gdb) I believe, this is a bug in mesa tracked here: https://gitlab.freedesktop.org/mesa/mesa/issues/1358 packages versions: libgl1-mesa-dri:amd64 20.0.4-2ubuntu1 amd64 xserver-xorg-video-intel 2:2.99.917+git20200226-1 amd64 xserver-xorg-core 2:1.20.8-2ubuntu2 amd64 ** Affects: mesa (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1877879 Title: segfault in iris_dri.so Status in mesa package in Ubuntu: New Bug description: As of Ubuntu 20.04, on intel graphics with intel driver (not modesetting), I got segfault whenever anything tries to use GL. This happens unless I export MESA_LOADER_DRIVER_OVERRIDE=i965. One says that it does not happen with modesetting driver. (gdb) run Starting program: /usr/bin/glxgears [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff17cf700 (LWP 97070)] [New Thread 0x7fffebfff700 (LWP 97071)] [New Thread 0x7ffff0fce700 (LWP 97072)] [New Thread 0x7fffeb7fe700 (LWP 97073)] Thread 1 "glxgears" received signal SIGSEGV, Segmentation fault. 0x00007ffff6a7e1d4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (gdb) where #0 0x00007ffff6a7e1d4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #1 0x00007ffff6c42de4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #2 0x00007ffff6a59e5d in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #3 0x00007ffff6a5aa95 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007ffff6099774 in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x000055555555711e in ?? () #6 0x0000555555556c88 in ?? () #7 0x00007ffff7ace0b3 in __libc_start_main (main=0x555555556410, argc=1, argv=0x7fffffffe698, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe688) at ../csu/libc-start.c:308 #8 0x0000555555556f0a in ?? () (gdb) I believe, this is a bug in mesa tracked here: https://gitlab.freedesktop.org/mesa/mesa/issues/1358 packages versions: libgl1-mesa-dri:amd64 20.0.4-2ubuntu1 amd64 xserver-xorg-video-intel 2:2.99.917+git20200226-1 amd64 xserver-xorg-core 2:1.20.8-2ubuntu2 amd64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1877879/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
