Thank you for looking into this issue. Reporting current status.
== "mwifiex crash after suspend"
This issue might be the Surface devices specific problem? Not sure.
I know some ways to prevent at least mwifiex crashing:
1. Disabling d3cold for wifi device (even doable on mainline kernels):
echo 0 | sudo tee
/sys/devices/pci0000:00/0000:00:1d.3/0000:03:00.0/d3cold_allowed # on SB1
echo 0 | sudo tee
/sys/devices/pci0000:00/0000:00:1d.0/0000:02:00.0/d3cold_allowed # on SP4
2. Your patch "0001-mwifiex-set-PCIE-to-PCI_D0-power-state-on-resume"
3. Disable bridge_d3 on mwifiex_pcie_probe()
pdev->bus->self->bridge_d3 = false;
but with those ways, as I mentioned before (Comment 108), it sometimes
not connect to AP automatically because it fails to find APs (`nmcli d
wifi list` shows empty). This is easily fixed by reloading the
"mwifiex_pcie" module.
Patch for this issue we (linux-surface community) are currently using is, based
this patch from sebanc:
- https://github.com/jakeday/linux-surface/issues/420#issuecomment-544615371
Actual commit is here:
-
https://github.com/linux-surface/kernel/commit/c8da40c0538a1528f3efd85cd91d9e314c85dd19
The patch from sebanc does the following things:
- modify mwifiex_pcie_suspend/mwifiex_pcie_resume functions to fix crash after
suspend.
It seems that the function mwifiex_pcie_suspend2 is from mwifiex_pcie_remove
and the function mwifiex_pcie_resume2 is largely from mwifiex_pcie_probe.
So, I think that it behaves in the same way as we unload modules before
suspend and re-load modules after suspend.
- disable bridge_d3 to fix crash after suspend
- disable "auto deep sleep" (I think not needed for this issue, but introduced
hoping to fix other issues)
I think the patch is too aggressive to be upstreamed as they are, but
please use it as a reference.
The patch also fixes S0ix on KBL/KBL-R devices (such as Surface Book 2,
Surface Pro 5, Surface Laptop 1 or later). SKL devices such as Surface
Pro 4 or Surface Book 1 cannot achieve S0ix anyway because of other
reasons outside of mwifiex.
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https://bugs.launchpad.net/bugs/1730924
Title:
Wifi does down "crash" in Surface Pro 4
Status in Linux:
Confirmed
Status in linux package in Ubuntu:
Incomplete
Bug description:
I have a Surface Pro 4. The wifi works well in principle, but unfortunately
it drops every x minutes. The only way to fix it I've found is to reboot the
computer.
lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-16-generic 4.13.0-16.19
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: predatux 1537 F.... pulseaudio
CurrentDesktop: KDE
Date: Wed Nov 8 10:41:26 2017
HibernationDevice: RESUME=UUID=147af4ba-a4ce-41fe-a176-b36a1f6a590b
Lsusb:
Bus 002 Device 002: ID 045e:090c Microsoft Corp.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 045e:07e8 Microsoft Corp.
Bus 001 Device 003: ID 1286:204c Marvell Semiconductor, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Microsoft Corporation Surface Pro 4
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic
root=UUID=125200b0-7377-4985-a217-15503781a525 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.13.0-16-generic N/A
linux-backports-modules-4.13.0-16-generic N/A
linux-firmware 1.169
SourcePackage: linux
UpgradeStatus: Upgraded to artful on 2017-10-22 (16 days ago)
dmi.bios.date: 02/24/2017
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: 106.1624.768
dmi.board.name: Surface Pro 4
dmi.board.vendor: Microsoft Corporation
dmi.chassis.type: 9
dmi.chassis.vendor: Microsoft Corporation
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvr106.1624.768:bd02/24/2017:svnMicrosoftCorporation:pnSurfacePro4:pvrD0B08F1C03P38:rvnMicrosoftCorporation:rnSurfacePro4:rvr:cvnMicrosoftCorporation:ct9:cvr:
dmi.product.family: Surface
dmi.product.name: Surface Pro 4
dmi.product.version: D:0B:08F:1C:03P:38
dmi.sys.vendor: Microsoft Corporation
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