| Summary: | kworker consumes 100% of a cpu core when screen sleeps with amdgpu kernel driver. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | DRI | Reporter: | Malcolm Lewis <malcolmlewis> | ||||||||
| Component: | DRM/AMDgpu | Assignee: | Default DRI bug account <dri-devel> | ||||||||
| Status: | RESOLVED FIXED | QA Contact: | |||||||||
| Severity: | normal | ||||||||||
| Priority: | medium | CC: | jano.vesely, striker, tiwai | ||||||||
| Version: | unspecified | ||||||||||
| Hardware: | Other | ||||||||||
| OS: | All | ||||||||||
| Whiteboard: | |||||||||||
| i915 platform: | i915 features: | ||||||||||
| Attachments: |
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Please attach the corresponding dmesg output. Created attachment 126111 [details]
Ourput from dmesg
I am hitting this bug on Carrizo as well. In particular, it only takes effect if the disabled output is the integrated screen (eDP-1). Disabling the DP-1 output (which is actually an HDMI port) connected to an external screen has no visible effects. My system is Arch Linux, with the default kernel (Vanilla Linux 4.7.2 with a one-line patch changing the default log level). I can provide additional information about my system if necessary. I can also try out kernel patches if that will help. *** Bug 97849 has been marked as a duplicate of this bug. *** For some reason the eDP panel is causing an hotplug interrupt storm when the panel is disabled. I'm not sure why radeon is behaving differently off hand. Does this only happen after a suspend/resume cycle? Fresh boot. This happens as soon as you change the display to _only_ push HDMI. Created attachment 126818 [details] [review] possible fix Does this patch help? (In reply to Alex Deucher from comment #8) > Created attachment 126818 [details] [review] [review] > possible fix > > Does this patch help? modified version of the patch helps on my setup. (patch modified to apply on top of ROCK kernel) (In reply to Alex Deucher from comment #8) > Created attachment 126818 [details] [review] [review] > possible fix > > Does this patch help? Hi I can confirm the patch also works for me, both with the Laptop screen, laptop and HDMI attached screen and just the HDMI screen. Kernel used: 4.8.0-rc8-2.g991ee60-default OS: openSUSE Tumbleweed 20160927 Note, there is no dce_v6_0.c file, so had to tweak your patch. Hi I would also like to confirm the patch works with the 4.4.21-3-default in openSUSE Leap 42.2 currently in beta. I also expect it to work with SLED 12 SP2 when released since they are running the same kernel, just need to update xf86-video-amdgpu to 1.1.2 for support of my GPU. Many thanks :) |
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Created attachment 126008 [details] System information and perf data Hi I have configured my system to use the amdgpu kernel driver (note no experimental support activated) on openSUSE Tumbleweed and running 4.8.0-rc2-3.gda13dfd-default. I did have to re-build the xf86-video-amdgpu to add my Mullins R5 PCI-IDs. I don't see this when running the radeon driver. Reproducible: Always Steps to Reproduce: 1. Boot to Gnome desktop. 2. Set timeout for screen saver 1-15 minutes doesn't matter. 3. From a remote ssh session monitor via top and observe one cpu at ~100% when screen save activates. Actual Results: I ran the following perf command to capture some data which will add as an attachment; perf record -F 250 -g -a sleep 10 perf report Expected Results: Not consume cpu when idle/screensaver mode. Attachment includes; 20-amdgpu.conf, dmidecode.txt, perf_data_summary.txt, 4.8.rc3.perf.data, os-release and Xorg.0.log