Bug 110997

Summary: NV50 fan runs at full speed after resume from suspend on kernels 5.1.8, 4.19.49
Product: xorg Reporter: Marc Meledandri <m.meledandri>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: m.meledandri
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
vbios.rom
none
Fix for Tesla i2c regression none

Description Marc Meledandri 2019-06-25 16:10:53 UTC 
Created attachment 144635 [details]
vbios.rom

As of stable kernels 5.1.8 and 4.19.49, the GTX 260 fan runs at full speed after resuming from suspend.

This behavior regressed as of commit 342406e4fbba9a174125fbfe6aeac3d64ef90f76
drm/nouveau/i2c: Disable i2c bus access after ->fini()
https://lkml.org/lkml/2019/6/7/673

Reverting this single commit when building the respective stable kernels fixes the fan speed issue.

$ lspci -nn -d 10de:
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT200 [GeForce GTX 260] [10de:05e2] (rev a1)

Discussion on Nouveau mailing list:
https://lists.freedesktop.org/archives/nouveau/2019-June/032620.html
Comment 1 Lyude Paul 2019-06-25 20:56:39 UTC 
Created attachment 144637 [details] [review]
Fix for Tesla i2c regression

Hi! Turns out I actually have one of these GPUs in my drawer, so I was able to reproduce this issue with no problems. Could you verify that the following patch fixes your issue? If so, I'll add your Tested-by and send it out onto the nouveau ML
Comment 2 Marc Meledandri 2019-06-25 21:54:14 UTC 
Hi! Thanks so much for the quick turnaround on this one. Great that you had a card on hand to test with.

I can confirm that this patch applied against stable kernel 5.1.15 resolves the fan speed issue when resuming from suspend.
Comment 3 Martin Peres 2019-12-04 09:50:29 UTC 
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