On 08/30/18 at 07:15am, Luca Coelho wrote:

On Wed, 2018-08-29 at 14:54 +0800, Dave Young wrote:

quoted

Hi,

Hi Dave,

quoted

Not sure if this is a known issue, I'm seeing this with latest mainline
kernel on Fedora rawhide.

The wireless networking is not stable, I can not access network any more after
downloading some big files or just browsing some web pages about some
time.  I do not see this when I work in office.  So this maybe relate to
wireless router.

"Can not access network" means ping timeout, can not open web pages etc.
But the wireless connection looks normal at least from the
NetworkManager icon it is still connected.

The router I used at home is an old ASUS WL520gc.  I can confirm I can
reproduce this with another ASUA router WL-500gP v2 

My laptop model is Thinkpad T480s.  It is painful I can only use
wireless,  any hints how to make it work will be appreciated!

lspci:
3d:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
        Subsystem: Intel Corporation Dual Band Wireless-AC 8265
        Flags: bus master, fast devsel, latency 0, IRQ 136
        Memory at dc100000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [c8] Power Management version 3
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [40] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number b4-6b-fc-ff-ff-a3-80-d6
        Capabilities: [14c] Latency Tolerance Reporting
        Capabilities: [154] L1 PM Substates
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi

Part of dmesg:

[    7.892039] Intel(R) Wireless WiFi driver for Linux
[    7.892041] Copyright(c) 2003- 2015 Intel Corporation
[    7.892168] iwlwifi 0000:3d:00.0: enabling device (0000 -> 0002)
[    7.898375] uvcvideo 1-8:1.0: Entity type for entity Extension 4 was not initialized!
[    7.899760] uvcvideo 1-8:1.0: Entity type for entity Extension 3 was not initialized!
[    7.901297] uvcvideo 1-8:1.0: Entity type for entity Processing 2 was not initialized!
[    7.902594] uvcvideo 1-8:1.0: Entity type for entity Camera 1 was not initialized!
[    7.904136] input: Integrated Camera: Integrated C as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/input/input11
[    7.906563] usbcore: registered new interface driver uvcvideo
[    7.906565] USB Video Class driver (1.1.1)
[    7.914162] iwlwifi 0000:3d:00.0: loaded firmware version 36.e91976c0.0 op_mode iwlmvm
[    8.080368] iwlwifi 0000:3d:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230
[    8.149556] iwlwifi 0000:3d:00.0: base HW address: b4:6b:fc:a3:80:d6
[    8.151643] RAPL PMU: API unit is 2^-32 Joules, 5 fixed counters, 655360 ms ovfl timer
[    8.151646] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
[    8.151648] RAPL PMU: hw unit of domain package 2^-14 Joules
[    8.151650] RAPL PMU: hw unit of domain dram 2^-14 Joules
[    8.151651] RAPL PMU: hw unit of domain pp1-gpu 2^-14 Joules
[    8.151653] RAPL PMU: hw unit of domain psys 2^-14 Joules
[    8.242895] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[    8.244972] thermal thermal_zone5: failed to read out thermal zone (-61)
[    8.266903] iwlwifi 0000:3d:00.0 wlp61s0: renamed from wlan0
[    8.376663] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x7f3001)
[    8.388476] psmouse serio1: elantech: Synaptics capabilities query result 0x90, 0x18, 0x0f.
[    8.404955] psmouse serio1: elantech: Elan sample query result 00, 20, c9
[    8.405711] intel_rapl: Found RAPL domain package
[    8.405729] intel_rapl: Found RAPL domain core
[    8.405732] intel_rapl: Found RAPL domain uncore
[    8.405734] intel_rapl: Found RAPL domain dram
[    8.417931] psmouse serio1: elantech: Trying to set up SMBus access
[    8.427666] elan_i2c 6-0015: 6-0015 supply vcc not found, using dummy regulator
[    8.428913] elan_i2c 6-0015: Linked as a consumer to regulator.0
[    8.442870] elan_i2c 6-0015: Elan Touchpad: Module ID: 0x0020, Firmware: 0x0001, Sample: 0x0000, IAP: 0x0000
[    8.443236] input: Elan Touchpad as /devices/pci0000:00/0000:00:1f.4/i2c-6/6-0015/input/input19
[    8.443961] input: Elan TrackPoint as /devices/pci0000:00/0000:00:1f.4/i2c-6/6-0015/input/input20
[    8.483396] systemd-udevd (584) used greatest stack depth: 11320 bytes left
[    8.534134] EXT4-fs (nvme0n1p4): mounted filesystem with ordered data mode. Opts: (null)
[    8.540006] EXT4-fs (nvme0n1p11): mounted filesystem with ordered data mode. Opts: (null)
[    8.544692] EXT4-fs (nvme0n1p3): mounted filesystem with ordered data mode. Opts: (null)
[    8.556466] EXT4-fs (nvme0n1p5): mounted filesystem with ordered data mode. Opts: (null)
[    8.565545] EXT4-fs (nvme0n1p8): mounted filesystem with ordered data mode. Opts: (null)
[    8.598930] EXT4-fs (nvme0n1p7): mounted filesystem with ordered data mode. Opts: (null)
[    8.620810] usb 1-7: USB disconnect, device number 2
[    8.643967] systemd-journald[522]: Received request to flush runtime journal from PID 1
[    8.786474] RPC: Registered named UNIX socket transport module.
[    8.786481] RPC: Registered udp transport module.
[    8.786482] RPC: Registered tcp transport module.
[    8.786483] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    9.033765] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    9.033767] Bluetooth: BNEP filters: protocol multicast
[    9.033774] Bluetooth: BNEP socket layer initialized
[    9.295788] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[    9.532690] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[    9.540906] IPv6: ADDRCONF(NETDEV_UP): wlp61s0: link is not ready
[    9.760641] IPv6: ADDRCONF(NETDEV_UP): wlp61s0: link is not ready
[   10.006921] IPv6: ADDRCONF(NETDEV_UP): wlp61s0: link is not ready
[   10.036910] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[   10.131377] IPv6: ADDRCONF(NETDEV_UP): wlp61s0: link is not ready
[   10.670126] Bluetooth: hci0: command 0xfc09 tx timeout
[   18.796221] Bluetooth: hci0: Failed to send firmware data (-110)
[   71.273464] fuse init (API version 7.27)
[   73.269439] IPv6: ADDRCONF(NETDEV_UP): wlp61s0: link is not ready
[   74.123114] wlp61s0: authenticate with 00:1f:c6:82:0a:57
[   74.126099] wlp61s0: send auth to 00:1f:c6:82:0a:57 (try 1/3)
[   74.139740] wlp61s0: authenticated
[   74.140142] iwlwifi 0000:3d:00.0 wlp61s0: disabling HE/HT/VHT due to WEP/TKIP use
[   74.140146] iwlwifi 0000:3d:00.0 wlp61s0: disabling HT as WMM/QoS is not supported by the AP
[   74.140149] iwlwifi 0000:3d:00.0 wlp61s0: disabling VHT as WMM/QoS is not supported by the AP

Your AP seems to be configured to use WEP or TKIP, which is not allowed
by IEEE802.11n, so we disable all the higher rates, as you can see
here.  It should still work, but you will only get very basic rates
(i.e. slow).

Luka, thanks for the suggestion,  moved AP to use WPA2-personal + AES.
seems I got only two features disabled this time:
[   20.949347] iwlwifi 0000:3d:00.0 wlp61s0: disabling HT as WMM/QoS is not supported by the AP
[   20.949351] iwlwifi 0000:3d:00.0 wlp61s0: disabling VHT as WMM/QoS is not supported by the AP
[   20.949622] wlp61s0: associate with 00:1f:c6:82:0a:57 (try 1/3)

quoted

[   74.141838] wlp61s0: associate with 00:1f:c6:82:0a:57 (try 1/3)
[   74.149298] wlp61s0: RX AssocResp from 00:1f:c6:82:0a:57 (capab=0x411 status=0 aid=3)
[   74.160220] wlp61s0: associated
[   74.201707] IPv6: ADDRCONF(NETDEV_CHANGE): wlp61s0: link becomes ready
[   79.350950] usb 1-2: new low-speed USB device number 4 using xhci_hcd
[   79.482476] usb 1-2: New USB device found, idVendor=17ef, idProduct=6016, bcdDevice= 0.00
[   79.482485] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   79.482491] usb 1-2: Product: ThinkPad USB Laser Mouse
[   79.482496] usb 1-2: Manufacturer: Lenovo
[   79.488601] input: Lenovo ThinkPad USB Laser Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:17EF:6016.0001/input/input21
[   79.490030] hid-generic 0003:17EF:6016.0001: input,hidraw0: USB HID v1.11 Mouse [Lenovo ThinkPad USB Laser Mouse] on usb-0000:00:14.0-2/input0
[   87.228112] tun: Universal TUN/TAP device driver, 1.6
[ 1870.764779] e1000e: enp0s31f6 NIC Link is Up 10 Mbps Full Duplex, Flow Control: Rx/Tx
[ 1870.764903] e1000e 0000:00:1f.6 enp0s31f6: 10/100 speed: disabling TSO
[ 1870.765098] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s31f6: link becomes ready
[ 2521.068469] wlp61s0: deauthenticating from 00:1f:c6:82:0a:57 by local choice (Reason: 3=DEAUTH_LEAVING)

Other than that I can't really see what is going on, except that
something is deciding to disconnect here...

So, first thing I'd suggest would be to try to reconfigure your AP to
use something else than WEP or TKIP, just to see if it improves in any
way.

Will observe if it works or not. BTW, my old laptop Thinkpad T440s works
well with the same AP.

And BTW, is this a regression in recent kernels or has this always
happened to you with this laptop/AP combination?

From my observation it just always happen, but hmm not 100% sure..

--
Cheers,
Luca.

Thanks
Dave