https://bugzilla.kernel.org/show_bug.cgi?id=194559
Bug ID: 194559 Summary: amdgpu problems loading 2 firmwares on multi-smp system Product: Drivers Version: 2.5 Kernel Version: 4.4.9 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: janpieter.sollie@dommel.be Regression: No
Created attachment 254705 --> https://bugzilla.kernel.org/attachment.cgi?id=254705&action=edit dmesg.txt, lspci.txt and .config
System: opteron 2876 (*2), 128GB ram, x86_64. VGA1: SI, cape verde pro. VGA2: R9 nano. VGA3: onboard mgag200. Distribution: gentoo. kernel: vanilla-sources-4.9.9. kernel loader: lilo 24 firmware: linux-firmware-20170126. bug: amdgpu loading on the system causes a reboot. even when disabling panic, the kernel does not wait for me to reset the system. the issue occurs even when booting the system with init=/bin/bash and then modprobe amdgpu. solutions: 1) removing /lib/firmware/radeon. 2) removing /lib/firmware/amdgpu. 3) boot the kernel with nosmp. Each of these solutions works, but causes hardware not to be initialized Tried without success: 1) using the radeon module instead of amdgpu. 2) using amdgpu-pro. 3) using a different kernel version (4.4.39). 4) boot with iommu=soft. 5) first load drm (works), then load amdgpu (crashes).
I suspect a nonsafe threaded kernel bug in drm.
In attachment: 1) dmesg of noSMP boot. 2) lspci output. 3) config of current 4.9.9 kernel.