Bug 111869 - Navi "divide error" hang
Summary: Navi "divide error" hang
Status: NEW
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: unspecified
Hardware: Other All
: not set not set
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2019-09-30 12:30 UTC by Doug Ty
Modified: 2019-10-08 10:56 UTC (History)
4 users (show)

See Also:
i915 platform:
i915 features:

divide-error_09-20.txt (4.27 KB, text/plain)
2019-09-30 12:30 UTC, Doug Ty
no flags Details
divide-error_09-30.txt (4.26 KB, text/plain)
2019-09-30 12:30 UTC, Doug Ty
no flags Details
divide-error_09-30-x2.txt (4.26 KB, text/plain)
2019-09-30 12:30 UTC, Doug Ty
no flags Details

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Description Doug Ty 2019-09-30 12:30:27 UTC
Created attachment 145593 [details]

Occasionally, usually while watching videos in Firefox, my GPU will hang and the screen will freeze -- sound and keyboard input still work in the background, and I need to use REISUB hotkeys to reboot. This is separate, in addition to the sdma and ring gfx_0.0.0 hangs.

Upon rebooting, journalctl shows the attached "divide error". I've included logs from 3 instances of it happening. I'm currently using the Jul 14 firmware from Fedora's linux-firmware package as the hang appears to occur more often on the newer firmware from https://people.freedesktop.org/~agd5f/radeon_ucode/navi10/ however this may just be placebo.

It occurs with or without the "0-sized IBs" kernel patch from https://bugs.freedesktop.org/show_bug.cgi?id=111481#c33 and on both PCIe 3.0 and 4.0. I'm not using a PCIe riser and the card works without issue on Windows 10 dual boot.

CPU: 3700X
GPU: Sapphire 5700XT (reference)
Motherboard: Gigabyte X570-I (BIOS F4)
Kernel: 5.3.0
Mesa: mesa-git 1:19.3.0_devel.115682.3c966fd688c-1
LLVM: llvm-git 10.0.0_r327425.63f6066b53d-1

Please let me know if any more information would be helpful, or if there's anything I can do to troubleshoot. Thanks.
Comment 1 Doug Ty 2019-09-30 12:30:48 UTC
Created attachment 145594 [details]
Comment 2 Doug Ty 2019-09-30 12:30:59 UTC
Created attachment 145595 [details]

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