Package: src:linux Version: 4.0.5-1 Severity: normal When using the kernel provided by linux-image-4.0.0-2-amd64, the WiFi bit rate is misreported. The exact (incorrect) bit rate changes on each boot (possibly on the first WiFi connection), but is constant until the computer is rebooted, regardless of WiFi disconnects or reconnects. The issue does not occur when using linux-image-3.16.0-4-amd64.
----- $ uname -a Linux iset 4.0.0-2-amd64 #1 SMP Debian 4.0.5-1 (2015-06-16) x86_64 GNU/Linux $ dpkg -l | grep firmware-iwl ii firmware-iwlwifi 0.44 $ dmesg | grep -i iwl [ 2.332168] iwlwifi 0000:03:00.0: firmware: failed to load iwlwifi-7260-12.ucode (-2) [ 2.332212] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7260-12.ucode failed with error -2 [ 2.332703] iwlwifi 0000:03:00.0: firmware: failed to load iwlwifi-7260-11.ucode (-2) [ 2.332744] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7260-11.ucode failed with error -2 [ 2.343878] iwlwifi 0000:03:00.0: firmware: direct-loading firmware iwlwifi-7260-10.ucode [ 2.344037] iwlwifi 0000:03:00.0: loaded firmware version 23.15.10.0 op_mode iwlmvm [ 2.389263] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 2.389337] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 2.389597] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 2.590343] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 4.734368] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 4.734629] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled $ /sbin/iwconfig eth0 no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"MYWIFI" Mode:Managed Frequency:5.745 GHz Access Point: 40:16:7E:XX:XX:XX Bit Rate=6 Mb/s Tx-Power=22 dBm Retry short limit:7 RTS thr:off Fragment thr:off Power Management:on Link Quality=60/70 Signal level=-50 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:32 Missed beacon:0 docker0 no wireless extensions. lo no wireless extensions. ----- I copied a 3GB file to/from my network share and repeatedly ran `iwconfig` to sample the reported bit rate. While my download was proceeding at 37 MBps, the reported bit rate was constant at 6 Mbps. I obtained iwlwifi-7260-12.ucode from the linux-firmware git repo master branch, copied it to /lib/firmware, rebooted, and reran the test. The results were the same. I rebooted into kernel 3.16 (which loads iwlwifi-7260-9.ucode despite the fact that iwlwifi-7260-10.ucode and iwlwifi-7260-12.ucode were available in /lib/firmware), the bit rate is correctly reported and fluctuated between about 500 to 700 Mbps. It is important to note that the actual download performance was not affected and was more or less constant throughout my tests. Only the reported bit rate was incorrect. Nevertheless, an incorrect bit rate will confuse people and may cause them to mistakenly believe that their WiFi routers are not working or configured properly. -- Package-specific info: ** Version: Linux version 4.0.0-2-amd64 (debian-ker...@lists.debian.org) (gcc version 4.9.2 (Debian 4.9.2-21) ) #1 SMP Debian 4.0.5-1 (2015-06-16) ** Command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-2-amd64 root=UUID=1fe17317-4e03-4bc1-8463-015ed156427e ro quiet splash acpi_osi=Linux ** Tainted: O (4096) * Out-of-tree module has been loaded. ** Kernel log: [ 2.380064] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0) [ 2.382153] FAT-fs (sda1): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! [ 2.389263] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 2.389337] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 2.389597] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 2.399262] Adding 2103996k swap on /dev/sda2. Priority:-1 extents:1 across:2103996k SSFS [ 2.399658] intel_rapl: Found RAPL domain package [ 2.399661] intel_rapl: Found RAPL domain core [ 2.399663] intel_rapl: Found RAPL domain uncore [ 2.399664] intel_rapl: Found RAPL domain dram [ 2.415702] cfg80211: World regulatory domain updated: [ 2.415705] cfg80211: DFS Master region: unset [ 2.415706] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) [ 2.415707] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 2.415708] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 2.415709] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) [ 2.415710] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) [ 2.415711] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) [ 2.415712] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) [ 2.415713] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) [ 2.415714] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) [ 2.424281] Bluetooth: Core ver 2.20 [ 2.424293] NET: Registered protocol family 31 [ 2.424294] Bluetooth: HCI device and connection manager initialized [ 2.424300] Bluetooth: HCI socket layer initialized [ 2.424303] Bluetooth: L2CAP socket layer initialized [ 2.424307] Bluetooth: SCO socket layer initialized [ 2.429119] usbcore: registered new interface driver btusb [ 2.434588] media: Linux media interface: v0.10 [ 2.437622] Linux video capture interface: v2.00 [ 2.442452] Bluetooth: hci0: read Intel version: 370710018002030d48 [ 2.442454] Bluetooth: hci0: Intel device is already patched. patch num: 48 [ 2.446023] uvcvideo: Found UVC 1.00 device Integrated Camera (04ca:7035) [ 2.454730] input: Integrated Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-12/1-12:1.0/input/input11 [ 2.454817] usbcore: registered new interface driver uvcvideo [ 2.454819] USB Video Class driver (1.1.1) [ 2.495238] ACPI: Video Device [VID] (multi-head: yes rom: no post: no) [ 2.495502] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input12 [ 2.495662] ACPI: Video Device [VID1] (multi-head: yes rom: yes post: no) [ 2.495811] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:09/LNXVIDEO:01/input/input13 [ 2.495932] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) [ 2.495935] [drm] Initialized i915 1.6.0 20150130 for 0000:00:02.0 on minor 0 [ 2.570623] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 2.590343] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 2.596410] fbcon: inteldrmfb (fb0) is primary device [ 2.596580] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input14 [ 2.596661] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input15 [ 2.596956] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input16 [ 2.638830] Switched to clocksource tsc [ 2.804823] psmouse serio1: synaptics: queried max coordinates: x [..5112], y [..3834] [ 2.837010] psmouse serio1: synaptics: queried min coordinates: x [1024..], y [1024..] [ 2.837012] psmouse serio1: synaptics: quirked min/max coordinates: x [1024..5112], y [2024..4832] [ 2.899656] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x127c00, board id: 2722, fw id: 1484859 [ 2.899663] psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0 [ 2.939518] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input7 [ 3.715943] Console: switching to colour frame buffer device 360x101 [ 3.722447] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 3.722448] i915 0000:00:02.0: registered panic notifier [ 3.788954] systemd-journald[255]: Received request to flush runtime journal from PID 1 [ 3.911976] Process accounting resumed [ 3.934096] random: nonblocking pool is initialized [ 3.942565] bbswitch: version 0.8 [ 3.942571] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.VID_ [ 3.942576] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG_.VID_ [ 3.942585] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150204/nsarguments-95) [ 3.942861] bbswitch: detected an Optimus _DSM function [ 3.942872] pci 0000:01:00.0: enabling device (0004 -> 0007) [ 3.942900] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on [ 3.944276] bbswitch: disabling discrete graphics [ 3.944283] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150204/nsarguments-95) [ 3.960323] thinkpad_acpi: EC reports that Thermal Table has changed [ 4.276643] ip_tables: (C) 2000-2006 Netfilter Core Team [ 4.294561] nf_conntrack version 0.5.0 (65536 buckets, 262144 max) [ 4.301937] ip6_tables: (C) 2000-2006 Netfilter Core Team [ 4.339801] Ebtables v2.0 registered [ 4.345717] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this. [ 4.734368] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 4.734629] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 4.745261] loop: module loaded [ 5.558846] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5.558849] Bluetooth: BNEP filters: protocol multicast [ 5.558853] Bluetooth: BNEP socket layer initialized [ 5.570932] Bluetooth: RFCOMM TTY layer initialized [ 5.570937] Bluetooth: RFCOMM socket layer initialized [ 5.570941] Bluetooth: RFCOMM ver 1.11 [ 7.064923] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3 [ 7.263667] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input17 [ 8.640755] wlan0: authenticate with 40:16:7e:f4:a5:94 [ 8.644118] wlan0: send auth to 40:16:7e:f4:a5:94 (try 1/3) [ 8.644607] wlan0: authenticated [ 8.647537] wlan0: associate with 40:16:7e:f4:a5:94 (try 1/3) [ 8.648328] wlan0: RX AssocResp from 40:16:7e:f4:a5:94 (capab=0x1011 status=0 aid=3) [ 8.649664] wlan0: associated [ 13.719948] usb 1-7: reset full-speed USB device number 3 using xhci_hcd [ 21.376447] hidraw: raw HID events driver (C) Jiri Kosina [ 21.377104] Bluetooth: HIDP (Human Interface Emulation) ver 1.2 [ 21.377109] Bluetooth: HIDP socket layer initialized [ 21.378944] hid-generic 0005:046D:B009.0001: unknown main item tag 0x0 [ 21.379003] input: Logitech Bluetooth Mouse M555b as /devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11:1.0/bluetooth/hci0/hci0:256/0005:046D:B009.0001/input/input18 [ 21.379104] hid-generic 0005:046D:B009.0001: input,hidraw0: BLUETOOTH HID v4.16 Mouse [Logitech Bluetooth Mouse M555b] on e8:2a:ea:15:7d:26 ** Model information sys_vendor: LENOVO product_name: 20BGCTO1WW product_version: ThinkPad W540 chassis_vendor: LENOVO chassis_version: Not Available bios_vendor: LENOVO bios_version: GNET73WW (2.21 ) board_vendor: LENOVO board_name: 20BGCTO1WW board_version: SDK0E50512 Std ** Loaded modules: hid_generic hidp hid ctr ccm xt_tcpudp ip6t_rpfilter rfcomm bnep xt_multiport xt_addrtype ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_REJECT nf_reject_ipv6 dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio libcrc32c loop ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter ip_tables x_tables binfmt_misc cpufreq_userspace cpufreq_powersave cpufreq_conservative cpufreq_stats bbswitch(O) joydev snd_hda_codec_hdmi arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media btusb bluetooth x86_pkg_temp_thermal intel_powerclamp intel_rapl nls_utf8 iosf_mbi nls_cp437 iwlmvm coretemp kvm_intel vfat iTCO_wdt fat mac80211 kvm iTCO_vendor_support crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul snd_hda_codec_generic i915 ghash_clmulni_intel aesni_intel iwlwifi aes_x86_64 psmouse evdev snd_hda_intel lrw efi_pstore snd_hda_controller gf128mul pcspkr serio_raw glue_helper snd_hda_codec ablk_helper snd_hwdep cfg80211 lpc_ich efivars drm_kms_helper mei_me cryptd i2c_i801 snd_pcm_oss mfd_core snd_mixer_oss mei drm snd_pcm thinkpad_acpi snd_timer nvram i2c_algo_bit snd soundcore wmi rfkill ie31200_edac tpm_tis ac battery tpm edac_core shpchp video intel_smartconnect button processor fuse ecryptfs parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 btrfs xor raid6_pq dm_mod uvesafb sg sr_mod cdrom sd_mod ahci libahci crc32c_intel libata sdhci_pci xhci_pci ehci_pci sdhci xhci_hcd ehci_hcd scsi_mod e1000e mmc_core ptp usbcore pps_core thermal usb_common thermal_sys -- System Information: Debian Release: stretch/sid APT prefers testing-updates APT policy: (500, 'testing-updates'), (500, 'stable-updates'), (500, 'testing'), (500, 'stable'), (100, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.0.0-2-amd64 (SMP w/8 CPU cores) Locale: LANG=en_DK.UTF-8@corusa, LC_CTYPE=en_DK.UTF-8@corusa (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages linux-image-4.0.0-2-amd64 depends on: ii debconf [debconf-2.0] 1.5.56 ii initramfs-tools [linux-initramfs-tool] 0.120 ii kmod 20-1 ii linux-base 3.5 Versions of packages linux-image-4.0.0-2-amd64 recommends: ii firmware-linux-free 3.3 ii irqbalance 1.0.6-3 Versions of packages linux-image-4.0.0-2-amd64 suggests: ii debian-kernel-handbook 1.0.15 ii grub-efi 2.02~beta2-26 ic grub-pc 1.99-27+deb7u2 ii linux-doc-4.0 4.0.5-1 Versions of packages linux-image-4.0.0-2-amd64 is related to: ii firmware-atheros 0.44 pn firmware-bnx2 <none> pn firmware-bnx2x <none> pn firmware-brcm80211 <none> ii firmware-intelwimax 0.44 ii firmware-ipw2x00 0.44 ii firmware-ivtv 0.44 ii firmware-iwlwifi 0.44 ii firmware-libertas 0.44 ii firmware-linux 0.44 ii firmware-linux-nonfree 0.44 ii firmware-myricom 0.44 ii firmware-netxen 0.44 ii firmware-qlogic 0.44 ii firmware-ralink 0.44 ii firmware-realtek 0.44 pn xen-hypervisor <none> -- debconf information excluded -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". 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