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Groups > linux.debian.kernel > #63933
| From | franckr <franckr01@online.de> |
|---|---|
| Newsgroups | linux.debian.bugs.dist, linux.debian.kernel |
| Subject | Bug#920759: workaround |
| Date | 2019-04-26 21:10 +0200 |
| Message-ID | <xReop-6Lu-11@gated-at.bofh.it> (permalink) |
| References | <xrvuy-2Cd-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Cross-posted to 2 groups.
Control: retitle -1 (with workaround) amdgpu+linux-images 4.9 & 4.19 crash randomly & always after X started, when dpm is enabled Workaround: disable dynamic power management ex: put in /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="quiet amdgpu.dpm=0" Mechanism guess: As behavior (works or crashes) depends of linux-image package (see below), and seems to evolve randomly across package versions (an older package version works, then a newer crashes, then a newer newer works again): This suggests that a variable/structure is not properly initialized inside amdgpu dynamic power management code. Then depending of the RAM content during package compilation, a good value (=> package will work) or a bad value (=> will crash) is built-in inside the package. This could explain the apparent random behavior across package versions. Work = (C) + (B) + linux-image-4.19.0-0.bpo.4-amd64-unsigned 4.19.28-2~bpo9+1 = upstream 10-Mar-2019 Crash = (B) + linux-image-4.19.0-0.bpo.4-amd64-unsigned 4.19.28-2~bpo9+1 = upstream 10-Mar-2019 Work = (B) + linux-image-4.19.0-0.bpo.2-amd64-unsigned 4.19.16-1~bpo9+1 = upstream 16-Jan-2019 Crash = (B) + linux-image-4.9.0-9-amd64 4.9.161-1 = upstream 27-Feb-2019 Crash = (A) + linux-image-4.9.0-8-amd64 4.9.144-1 = upstream 08-Dec-2018 Work = (A) + linux-image-4.9.0-8-amd64 4.9.135-1 = upstream 20-Oct-2018 (C) = disabled dynamic power management (B) = (firmware-amd-graphics 20190114-1) + (1920x1200 59.95Hz 8bit per RGB = nothing special) (A) = (firmware-amd-graphics 20161130-4) Kind Regards, Franck
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Bug#920759: workaround franckr <franckr01@online.de> - 2019-04-26 21:10 +0200 Processed: workaround "Debian Bug Tracking System" <owner@bugs.debian.org> - 2019-04-26 21:10 +0200
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