| Summary: | sys-kernel/gentoo-sources-5.4.28: flickering black lines on Mobility Radeon 7500 | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | lebkoungcity |
| Component: | Current packages | Assignee: | Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel> |
| Status: | RESOLVED WORKSFORME | ||
| Severity: | normal | CC: | jstein |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | x86 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Attachments: |
Photo of flickering black lines on screen.
Xorg.0.log dmesg config-5.4.28-gentoo emerge --info bisect.log |
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Created attachment 632734 [details]
Xorg.0.log
Created attachment 632736 [details]
dmesg
Created attachment 632738 [details]
config-5.4.28-gentoo
see also: https://forums.gentoo.org/viewtopic-t-1110960.html Thanks for your attention! Why do you think this is a gentoo related bug? Created attachment 633274 [details]
emerge --info
Forgot to add emerge --info, now added.
(In reply to Jonas Stein from comment #5) > Why do you think this is a gentoo related bug? I searched the net for problems like this but found only topics that are either several years old and/or have other impacts. Maybe I just didn't find related postings? Then I'd be sorry for opening this bug... In the meantime I have also tried sys-kernel/gentoo-sources-5.6.3 and the result is the same - flickering black lines. Standard steps here: Try the latest vanilla-sources 5.6.X kernel and see if it's there. You can also try the latest vanilla-sources 5.4.X kernel (latest) If the problem still exists, find the last working kernel and first non-working kernel and attempt a git bisect. It's a little tedious, but it does sometimes identify an offending commit. https://git-scm.com/docs/git-bisect Thanks a lot for your suggestion. By coincidence I did start that last weekend and now I have the results. (I followed these instructions: https://wiki.gentoo.org/wiki/Kernel_git-bisect ) I add the log as attachment and it seems this is the commit in question: commit 33b3ad3788aba846fc8b9a065fe2685a0b64f713 Author: Christoph Hellwig <hch@lst.de> Date: Thu Aug 15 09:27:00 2019 +0200 drm/radeon: handle PCIe root ports with addressing limitations radeon uses a need_dma32 flag to indicate to the drm core that some allocations need to be done using GFP_DMA32, but it only checks the device addressing capabilities to make that decision. Unfortunately PCIe root ports that have limited addressing exist as well. Use the dma_addressing_limited instead to also take those into account. Reviewed-by: Christian König <christian.koenig@amd.com> Reported-by: Atish Patra <Atish.Patra@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> drivers/gpu/drm/radeon/radeon.h | 1 - drivers/gpu/drm/radeon/radeon_device.c | 12 +++++------- drivers/gpu/drm/radeon/radeon_ttm.c | 2 +- 3 files changed, 6 insertions(+), 9 deletions(-) Created attachment 640964 [details]
bisect.log
Now that there is the result of the bisect - What to do next? Where should I take it/report it? Thanks a lot! :) (In reply to lebkoungcity from comment #11) > Now that there is the result of the bisect - What to do next? Where should I > take it/report it? > > Thanks a lot! :) This might be the best place --> https://bugzilla.kernel.org/ I reported it here: https://bugzilla.kernel.org/show_bug.cgi?id=208263 weeks ago but there was never any reaction to this. (And today I updated it, see below.) Is there any other place to put it? Anyway, today I tried sys-kernel/gentoo-sources-5.8.0-r1 and the flickering is still there. When I disable 'High Memory Support' the flickering does not happen. (I found that somewhere on the net.) But with 'High Memory Support' set to '4GB' it shows up. Unfortunately I need all of the installed 2GB RAM so I need to set 'High Memory Support' to '4GB'... Seems to be resolved. Tried it again with sys-kernel/gentoo-sources-5.4.92 and nothing flickers. |
Created attachment 632732 [details] Photo of flickering black lines on screen. I have flickering black lines on X when booting the kernel I compiled from sys-kernel/gentoo-sources-5.4.28. No problems with sys-kernel/gentoo-sources-4.19.97. I re-compiled the kernel three times, the last one after 'make clean', 'make mrproper and 'make distclean' and re-creating .config from the working '4.19.97' with 'make oldconfig'. Hardware: ThinkPad R40 with RV200/M7 [Mobility Radeon 7500] in make.conf: VIDEO_CARDS="radeon r100" Attachments are: - picture of screen with flickering fine black lines - Xorg.0.log - dmesg - config (5.4.28-gentoo) - emerge --info