Date: Sat, 29 Jul 2023 10:50:52 +0300
From: "Neftin, Sasha" <sasha.neftin@...el.com>
To: <kkiot@...a.io>, Jesse Brandeburg <jesse.brandeburg@...el.com>, "Anthony L
 Nguyen" <anthony.l.nguyen@...el.com>, "Ruinskiy, Dima"
	<dima.ruinskiy@...el.com>, "Avivi, Amir" <amir.avivi@...el.com>,
	<ron.soesan@...el.com>
CC: Netdev <netdev@...r.kernel.org>, Intel Wired Lan
	<intel-wired-lan@...ts.osuosl.org>
Subject: Re: [Intel-wired-lan] PROBLEM: igc driver - Ethernet NIC speed not
 changing

On 7/25/2023 23:38, kkiot@...a.io wrote:
> [1.] One line summary of the problem: igc driver - Ethernet NIC speed 
> not changing
> [2.] Full description of the problem/report:
> Trying to change my I225-V's connection speed to 1000 Mbps down from 
> 2500 Mbps as a workaround to disconnection issues, but changes won't 
> apply, regardless of using NetworkManager or ethtool.
> 
> NetworkManager displays the changed values, but they don't seem to 
> actually apply.
> 
> Using ethtool to change the speed to 1000 Mbps (`ethtool -s enp6s0 speed 
> 1000`) also fails.
> The interface gets brought down then up with the same 2500 Mbps speed.

I would suspect "link speed" is a consequent problem here. Please, check 
your setup. Why does disconnection happen again and again? Any problems 
with the PCIe link? (caused by reset adapter)
I recommend you contact the platform's vendor support.

> 
> [3.] Keywords (i.e., modules, networking, kernel): driver, networking, 
> igc, intel
> [4.] Kernel information
> [4.1.] Kernel version (from /proc/version): Linux version 6.4.6-arch1-1 
> (linux@...hlinux) (gcc (GCC) 13.1.1 20230714, GNU ld (GNU Binutils) 
> 2.40.0) #1 SMP PREEMPT_DYNAMIC Mon, 24 Jul 2023 20:19:38 +0000
> [4.2.] Kernel .config file: Cannot obtain
> [5.] Most recent kernel version which did not have the bug: 6.2.9 or 
> more recent?
> [6.] Output of Oops.. message (if applicable) with symbolic information 
> resolved (see Documentation/admin-guide/bug-hunting.rst) N/A
> [7.] A small shell script or example program which triggers the problem 
> (if possible)
> # ethtool -s [INTERFACE] speed 1000
> [8.] Environment
> [8.1.] Software (add the output of the ver_linux script here) Cannot obtain
> [8.2.] Processor information (from /proc/cpuinfo):
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 23
> model : 113
> model name : AMD Ryzen 5 3600 6-Core Processor
> stepping : 0
> microcode : 0x8701030
> cpu MHz : 2473.153
> cache size : 512 KB
> physical id : 0
> siblings : 12
> core id : 0
> cpu cores : 6
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 16
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
> pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt 
> pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid 
> extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 
> sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy 
> svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs 
> skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx 
> cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 
> avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt 
> xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero 
> irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save 
> tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold 
> avic v_vmsave_vmload vgif v_spec_ctrl rdpid overflow_recov succor smca 
> sev sev_es
> bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed 
> smt_rsb
> bogomips : 7188.50
> TLB size : 3072 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 43 bits physical, 48 bits virtual
> power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
> 
> (repeats 12x: 12 threads processor)
> [8.3.] Module information (from /proc/modules):
> igc 188416 0 - Live 0x0000000000000000
> [8.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
> /proc/ioports
> 0000-0000 : PCI Bus 0000:00
>    0000-0000 : dma1
>    0000-0000 : pic1
>    0000-0000 : timer0
>    0000-0000 : timer1
>    0000-0000 : keyboard
>    0000-0000 : PNP0800:00
>    0000-0000 : keyboard
>    0000-0000 : rtc0
>    0000-0000 : dma page reg
>    0000-0000 : pic2
>    0000-0000 : ACPI PM2_CNT_BLK
>    0000-0000 : dma2
>    0000-0000 : fpu
>    0000-0000 : pnp 00:03
>    0000-0000 : pnp 00:03
> 0000-0000 : PCI Bus 0000:00
> 0000-0000 : PCI Bus 0000:00
>    0000-0000 : serial
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>      0000-0000 : ACPI PM1a_EVT_BLK
>      0000-0000 : ACPI PM1a_CNT_BLK
>      0000-0000 : ACPI PM_TMR
>      0000-0000 : ACPI GPE0_BLK
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>      0000-0000 : piix4_smbus
>    0000-0000 : pnp 00:04
>      0000-0000 : piix4_smbus
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
>    0000-0000 : pnp 00:04
> 0000-0000 : PCI conf1
> 0000-0000 : PCI Bus 0000:00
>    0000-0000 : PCI Bus 0000:07
>      0000-0000 : PCI Bus 0000:08
>        0000-0000 : PCI Bus 0000:09
>          0000-0000 : 0000:09:00.0
> 
> /proc/iomem
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
>    00000000-00000000 : PCI Bus 0000:00
>    00000000-00000000 : System ROM
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : ACPI Non-volatile Storage
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : System RAM
> 00000000-00000000 : System RAM
> 00000000-00000000 : System RAM
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
>    00000000-00000000 : MSFT0101:00
>      00000000-00000000 : MSFT0101:00
>    00000000-00000000 : MSFT0101:00
>      00000000-00000000 : MSFT0101:00
> 00000000-00000000 : ACPI Tables
> 00000000-00000000 : ACPI Non-volatile Storage
> 00000000-00000000 : Reserved
> 00000000-00000000 : System RAM
> 00000000-00000000 : Reserved
> 00000000-00000000 : PCI Bus 0000:00
>    00000000-00000000 : PCI MMCONFIG 0000 [bus 00-7f]
>      00000000-00000000 : pnp 00:00
>    00000000-00000000 : PCI Bus 0000:0b
>      00000000-00000000 : 0000:0b:00.3
>        00000000-00000000 : xhci-hcd
>      00000000-00000000 : 0000:0b:00.1
>        00000000-00000000 : ccp
>      00000000-00000000 : 0000:0b:00.4
>        00000000-00000000 : ICH HD audio
>      00000000-00000000 : 0000:0b:00.1
>        00000000-00000000 : ccp
>    00000000-00000000 : PCI Bus 0000:07
>      00000000-00000000 : PCI Bus 0000:08
>        00000000-00000000 : PCI Bus 0000:09
>          00000000-00000000 : 0000:09:00.0
>          00000000-00000000 : 0000:09:00.0
>          00000000-00000000 : 0000:09:00.1
>            00000000-00000000 : ICH HD audio
>      00000000-00000000 : 0000:07:00.0
>    00000000-00000000 : PCI Bus 0000:02
>      00000000-00000000 : PCI Bus 0000:03
>        00000000-00000000 : PCI Bus 0000:06
>          00000000-00000000 : 0000:06:00.0
>            00000000-00000000 : igc
>          00000000-00000000 : 0000:06:00.0
>            00000000-00000000 : igc
>      00000000-00000000 : 0000:02:00.1
>      00000000-00000000 : 0000:02:00.1
>        00000000-00000000 : ahci
>      00000000-00000000 : 0000:02:00.0
>        00000000-00000000 : xhci-hcd
>    00000000-00000000 : PCI Bus 0000:01
>      00000000-00000000 : 0000:01:00.0
>        00000000-00000000 : nvme
> 00000000-00000000 : pnp 00:01
>    00000000-00000000 : MSFT0101:00
> 00000000-00000000 : amd_iommu
> 00000000-00000000 : Reserved
> 00000000-00000000 : IOAPIC 0
> 00000000-00000000 : IOAPIC 1
> 00000000-00000000 : Reserved
>    00000000-00000000 : pnp 00:04
> 00000000-00000000 : Reserved
>    00000000-00000000 : AMDIF030:00
>      00000000-00000000 : AMDIF030:00 AMDIF030:00
> 00000000-00000000 : Reserved
>    00000000-00000000 : HPET 0
>      00000000-00000000 : PNP0103:00
> 00000000-00000000 : Reserved
> 00000000-00000000 : Reserved
>    00000000-00000000 : AMDI0030:00
>      00000000-00000000 : AMDI0030:00 AMDI0030:00
> 00000000-00000000 : pnp 00:04
> 00000000-00000000 : Reserved
>    00000000-00000000 : AMDI0010:03
>      00000000-00000000 : AMDI0010:03 AMDI0010:03
> 00000000-00000000 : Reserved
> 00000000-00000000 : Local APIC
>    00000000-00000000 : pnp 00:04
> 00000000-00000000 : pnp 00:04
> 00000000-00000000 : System RAM
>    00000000-00000000 : Kernel code
>    00000000-00000000 : Kernel rodata
>    00000000-00000000 : Kernel data
>    00000000-00000000 : Kernel bss
> 00000000-00000000 : Reserved
> 00000000-00000000 : PCI Bus 0000:00
>    00000000-00000000 : PCI Bus 0000:07
>      00000000-00000000 : PCI Bus 0000:08
>        00000000-00000000 : PCI Bus 0000:09
>          00000000-00000000 : 0000:09:00.0
>          00000000-00000000 : 0000:09:00.0
> 00000000-00000000 : 0000:09:00.0
> [8.5.] PCI information ('lspci -vvv' as root)
> 06:00.0 Ethernet controller: Intel Corporation Ethernet Controller 
> I225-V (rev 02)
> Subsystem: ASUSTeK Computer Inc. Ethernet Controller I225-V
> 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 36
> IOMMU group: 15
> Region 0: Memory at fcc00000 (32-bit, non-prefetchable) [size=1M]
> Region 3: Memory at fcd00000 (32-bit, non-prefetchable) [size=16K]
> Capabilities: [40] 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=1 PME-
> Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
> Address: 0000000000000000  Data: 0000
> Masking: 00000000  Pending: 00000000
> Capabilities: [70] MSI-X: Enable+ Count=5 Masked-
> Vector table: BAR=3 offset=00000000
> PBA: BAR=3 offset=00002000
> Capabilities: [a0] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
> ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0W
> DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
> RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
> MaxPayload 512 bytes, MaxReadReq 512 bytes
> DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
> LnkCap: Port #9, Speed 5GT/s, Width x1, ASPM L1, Exit Latency L1 <4us
> ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
> LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 5GT/s, Width x1
> TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
> DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR+
> 10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix-
> EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
> FRS- TPHComp- ExtTPHComp-
> AtomicOpsCap: 32bit- 64bit- 128bitCAS-
> DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- 10BitTagReq- 
> OBFF Disabled,
> AtomicOpsCtl: ReqEn-
> LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
> Transmit Margin: Normal Operating Range, EnterModifiedCompliance- 
> ComplianceSOS-
> Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
> LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- 
> EqualizationPhase1-
> EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
> Retimer- 2Retimers- CrosslinkRes: unsupported
> Capabilities: [100 v2] 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- AdvNonFatalErr-
> CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
> AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ 
> ECRCChkEn-
> MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
> HeaderLog: 00000000 00000000 00000000 00000000
> Capabilities: [140 v1] Device Serial Number 24-4b-fe-ff-ff-5a-40-86
> Capabilities: [1c0 v1] Latency Tolerance Reporting
> Max snoop latency: 0ns
> Max no snoop latency: 0ns
> Capabilities: [1f0 v1] Precision Time Measurement
> PTMCap: Requester:+ Responder:- Root:-
> PTMClockGranularity: 4ns
> PTMControl: Enabled:+ RootSelected:-
> PTMEffectiveGranularity: Unknown
> Capabilities: [1e0 v1] L1 PM Substates
> L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+ L1_PM_Substates+
> L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
> L1SubCtl2:
> Kernel driver in use: igc
> Kernel modules: igc
> [8.6.] SCSI information (from /proc/scsi/scsi) Empty
> [8.7.] Other information that might be relevant to the problem (please 
> look in /proc and include all information that you think to be relevant):
> Relevant logs after running `ethtool -s enp6s0 speed 1000`:
> 
> juil. 25 21:14:56 kkiotarch NetworkManager[459]: <info>  
> [1690312496.0963] device (enp6s0): carrier: link connected
> juil. 25 21:14:56 kkiotarch kernel: igc 0000:06:00.0 enp6s0: NIC Link is 
> Up 2500 Mbps Full Duplex, Flow Control: RX/TX
> 
> [X.] Other notes, patches, fixes, workarounds:
> As a temporary solution, I have forced port speed to be set at 1000 Mbps 
> via my router.

rather auto negotiated to 1G (force speed is n/a for 1G/2.5G). This 
won't resolve disconnetions.

> 
> Apologies if this should have submitted to my distribution's bug report 
> first (Arch Linux); on my current kernel version, there should be no 
> patches applied here compared to upstream.
> 
> Thank you,
> KKIOT
> 
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@...osl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan

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