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Date: Wed, 14 Jan 2015 12:36:31 +0200
Message-ID: <CANUX_P2-=HmRyxUukG5YyVu+=P4YtsDwQjJFZEj6_L6EQoNLtA@mail.gmail.com> (sfid-20150114_113639_270864_B9745FFD)
Subject: Re: [REGRESSION] iwlfiwi with Intel Centrino N1000 won't work with power_save
From: Emmanuel Grumbach <egrumbach@gmail.com>
To: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
	"Wysocki, Rafael" <rafael@kernel.org>,
	Alex Nik <rage.iz.me@gmail.com>,
	Linux PM list <linux-pm@vger.kernel.org>
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Sender: linux-wireless-owner@vger.kernel.org
List-ID: <linux-wireless.vger.kernel.org>

>>>> Hi,
>>>>
>>>> I got report from people that on Intel Centrino N1000 wifi won't
>>>> work after
>>>> updating to 3.17.8. I see in that release Fedora maints enabled
>>>> POWERCAP and
>>>> INTEL RAPL. We got working wifi only after disabling powersave via
>>>> `iw dev wlp2s0 set power_save off`.
>>
>> What kernel version did you have before?
>> BTW - for this device, power save is supposed to be disabled by
>> default, but I need to check
> 3.17.4

$ git log --oneline v3.17.4..v3.17.8 -- drivers/net/wireless/iwlwifi/
fb14996 iwlwifi: mvm: check TLV flag before trying to use hotspot
firmware commands
4e709ff iwlwifi: mvm: ROC - bug fixes around time events and locking
85ebf94 iwlwifi: pcie: fix prph dump length

none of these are related to the device your are reporting about.

>>>>
>>>> How we can debug this?
>>>>
>>>> lspci above.
>>>>
>>>> 02:00.0 Network controller [0280]: Intel Corporation Centrino
>>>> Wireless- N 1000 [Condor Peak] [8086:0084]
>>>>         Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN
>>>> [8086:1315]
>>>>         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
>>>> ParErr- Stepping- SERR- FastB2B- DisINTx+
>>>>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast
>>>> >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>         Latency: 0, Cache Line Size: 64 bytes
>>>>         Interrupt: pin A routed to IRQ 28
>>>>         Region 0: Memory at d1500000 (64-bit, non-prefetchable)
>>>> [size=8K]
>>>>         Capabilities: [c8] Power Management version 3
>>>>                 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
>>>> PME(D0+,D1-
>>>> ,D2-,D3hot+,D3cold+)
>>>>                 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0
>>>> PME-
>>>>         Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>>>                 Address: 00000000fee0800c  Data: 4122
>>>>         Capabilities: [e0] Express (v1) Endpoint, MSI 00
>>>>                 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency
>>>> L0s
>>>> <512ns, L1 unlimited
>>>>                 ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
>>>>                 DevCtl: Report errors: Correctable- Non-Fatal- Fatal-
>>>> Unsupported-
>>>>                 RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
>>>>                 MaxPayload 128 bytes, MaxReadReq 128 bytes
>>>>                 DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq-
>>>> AuxPwr+ TransPend-
>>>>                 LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s
>>>> L1,
>>>> Exit Latency L0s <128ns, L1 <32us
>>>>                 ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp-
>>>>                 LnkCtl: ASPM Disabled; RCB 64 bytes Disabled-
>>>> CommClk+
>>>>                 ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
>>>>                 LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train-
>>>> SlotClk+ DLActive- BWMgmt- ABWMgmt-
>>>>         Capabilities: [100 v1] Advanced Error Reporting
>>>>                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt-
>>>> UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt-
>>>> UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>                 UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt-
>>>> UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
>>>>                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout-
>>>> NonFatalErr-
>>>>                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout-
>>>> NonFatalErr+
>>>>                 AERCap: First Error Pointer: 00, GenCap- CGenEn-
>>>> ChkCap- ChkEn-
>>>>         Capabilities: [140 v1] Device Serial Number 74-e5-0b-ff-ff-
>>>> cc-
>>>> 82-24
>>>>         Kernel driver in use: iwlwifi
>>>>         Kernel modules: iwlwifi
>>>> --
>>>> -Igor Gnatenko
>>> CC linux-pm@
>>> --
>>> -Igor Gnatenko
>
>
>
> --
> -Igor Gnatenko