linux-kernel - Re: [Regression] [PCI/ASPM] [ASUS PN51] Reboot on resume attempt (bisect done; commit found)

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Message-ID: <a83ad70d-910e-4bb4-97c8-008dc74526c4@5challer.de>
Date: Fri, 29 Dec 2023 11:31:20 +0100
From: Michael Schaller <michael@...aller.de>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: bhelgaas@...gle.com, kai.heng.feng@...onical.com,
 linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
 regressions@...ts.linux.dev, macro@...am.me.uk, ajayagarwal@...gle.com,
 sathyanarayanan.kuppuswamy@...ux.intel.com, gregkh@...uxfoundation.org,
 hkallweit1@...il.com, michael.a.bottini@...ux.intel.com,
 johan+linaro@...nel.org, "David E. Box" <david.e.box@...ux.intel.com>
Subject: Re: [Regression] [PCI/ASPM] [ASUS PN51] Reboot on resume attempt
 (bisect done; commit found)

> Hi Michael, thank you very much for debugging and reporting this!
> Sorry for the major inconvenience.
> 
You're welcome and the only inconvenience was doing the bisect. ;-)

> We have some known issues with saving and restoring ASPM state on
> suspend/resume, in particular with ASPM L1 Substates, which are
> enabled on this device.
> 
> David Box has a patch in the works that should fix one of those
> issues:
> https://lore.kernel.org/r/20231221011250.191599-1-david.e.box@linux.intel.com
> 
> It's not merged yet, but it's possible it might fix or at least be
> related to this.  If you try it out, please let us know what happens.
> 
I gave the proposed patch a quick test on top of kernel 6.6.8 and it 
didn't affect this issue (the reboot still happens on resume attempt).