System Information
Operating system: Ubuntu 19.10
Graphics card: Dual: 1) GP107GLM [Quadro P-1000 Mobile] ... 2) Intel i915
Kernel: Linux 5.3.0-23-generic #25-Ubuntu SMP Tue Nov 12 09:22:33 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Wacom Driver:
$ dpkg --list | grep wacom ii libwacom-bin 1.1-1 amd64 Wacom model feature query library -- binaries ii libwacom-common 1.1-1 all Wacom model feature query library (common files) ii libwacom2:amd64 1.1-1 amd64 Wacom model feature query library ii xserver-xorg-input-wacom 1:0.36.1-0ubuntu2 amd64 X.Org X server -- Wacom input driver
Blender Version
Blender 2.8x
Have tried with Blender 2.80 and 2.81
$blender --version
Blender 2.81 (sub 16)
build date: 2019-11-20
build time: 16:31:09
build commit date: 2019-11-20
build commit time: 14:27
build hash: 26bd5ebd42e3
build platform: Linux
build type: Release
build c flags: -Wall -Wcast-align -Werror=implicit-function-declaration -Werror=return-type -Werror=vla -Wstrict-prototypes -Wmissing-prototypes -Wno-char-subscripts -Wno-unknown-pragmas -Wpointer-arith -Wunused-parameter -Wwrite-strings -Wlogical-op -Wundef -Winit-self -Wmissing-include-dirs -Wno-div-by-zero -Wtype-limits -Wformat-signedness -Wnonnull -Wuninitialized -Wredundant-decls -Wshadow -Wno-error=unused-but-set-variable -fuse-ld=gold -std=gnu11 -msse -pipe -fPIC -funsigned-char -fno-strict-aliasing -msse2 -D_GLIBCXX_USE_CXX11_ABI=0
build c++ flags: -Wredundant-decls -Wall -Wno-invalid-offsetof -Wno-sign-compare -Wlogical-op -Winit-self -Wmissing-include-dirs -Wno-div-by-zero -Wtype-limits -Werror=return-type -Wno-char-subscripts -Wno-unknown-pragmas -Wpointer-arith -Wunused-parameter -Wwrite-strings -Wundef -Wformat-signedness -Wuninitialized -Wundef -Wmissing-declarations -fuse-ld=gold -std=c++11 -msse -pipe -fPIC -funsigned-char -fno-strict-aliasing -msse2 -D_GLIBCXX_USE_CXX11_ABI=0
build link flags: -Wl,--version-script='/home/sources/buildbot-x86_64-slave/linux_glibc217_x86_64_cmake/blender.git/source/creator/blender.map'
build system: CMakeWorks: Blender 2.79
Short description of error
Blender 2.8x crashes at start unless you remove and then re-add wacom driver.
$ cat blender.crash.txt # backtrace ./blender-2.81-linux-glibc217-x86_64/blender(BLI_system_backtrace+0x1d) [0x14ee85d] ./blender-2.81-linux-glibc217-x86_64/blender() [0x12cbb79] /lib/x86_64-linux-gnu/libc.so.6(+0x46470) [0x7f8158aec470] ./blender-2.81-linux-glibc217-x86_64/blender(_ZN15GHOST_SystemX1120refreshXInputDevicesEv+0x16e) [0x3227c4e] ./blender-2.81-linux-glibc217-x86_64/blender(_ZN15GHOST_SystemX11C1Ev+0x43b) [0x322827b] ./blender-2.81-linux-glibc217-x86_64/blender(_ZN13GHOST_ISystem12createSystemEv+0x35) [0x32250c5] ./blender-2.81-linux-glibc217-x86_64/blender(GHOST_CreateSystem+0x9) [0x3224149] ./blender-2.81-linux-glibc217-x86_64/blender(wm_ghost_init+0x2d) [0x16c694d] ./blender-2.81-linux-glibc217-x86_64/blender(WM_init+0x27d) [0x16b28ed] ./blender-2.81-linux-glibc217-x86_64/blender(main+0x280) [0x1237f00] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f8158acd1e3] ./blender-2.81-linux-glibc217-x86_64/blender() [0x12c849c]
Exact steps for others to reproduce the error
(0) Log onto laptop. Have laptop go into sleep/wake.
(1) Have the HP G2 stylus NOT yet connected.
(2) Start Blender 2.8x ... all is ok.
(2) Connect HP G2 stylus via Bluetooth.
(3) Blender immediately core dumps the instant you get the "stylus connected" message . Try to start blender again, it will not run (immediate crash on start)
$ blender --debug-gpu --debug-gpu-shaders --factory-startup &> startup-log.txt Segmentation fault (core dumped) $ cat startup-log.txt Writing: blender.crash.txt
(4) Remove and re-add wacom module
$sudo modprobe wacom -r $sudo modprobe wacom
(5) start blender (works).
This might be an issue that you might feel is more of a wacom, i2c_hid, BIOS, or core kernel issue, but I'm reporting it here because blender 2.8x is the only program I've found that crashes in this way. Blender 2.7x on the exact same system does not crash under similar conditions when the HP G2 stylus connects so it's something unique to Blender 2.8x.