wifi crash on wakeup (iwl3945 cfg80211)

[hlorridi]

[124243.445408] ------------[ cut here ]------------
[124243.445437] WARNING: CPU: 0 PID: 24983 at /build/buildd/linux-3.19.0/net/mac80211/driver-ops.h:12 ieee80211_do_stop+0x8e7/0x8f0 [mac80211]()
[124243.445439] wlan0: Failed check-sdata-in-driver check, flags: 0x4
[124243.445441] Modules linked in: ctr ccm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media coretemp kvm_intel kvm amdkfd amd_iommu_v2 arc4 snd_hda_codec_conexant snd_hda_codec_generic joydev snd_hda_codec_hdmi serio_raw radeon snd_hda_intel snd_hda_controller snd_hda_codec iwl3945 snd_hwdep iwlegacy ttm snd_pcm drm_kms_helper lpc_ich mac80211 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq drm snd_seq_device cfg80211 snd_timer snd toshiba_acpi i2c_algo_bit soundcore shpchp sparse_keymap wmi toshiba_bluetooth mac_hid video parport_pc ppdev lp parport autofs4 psmouse firewire_ohci firewire_core sdhci_pci crc_itu_t sdhci pata_acpi sky2
[124243.445485] CPU: 0 PID: 24983 Comm: kworker/0:0 Tainted: G W 3.19.0-17-generic #17-Ubuntu
[124243.445487] Hardware name: TOSHIBA Satellite P300/Satellite P300, BIOS V4.20 01/05/2009
[124243.445498] Workqueue: events ieee80211_restart_work [mac80211]
[124243.445500] ffffffffc0627768 ffff8800805a3b48 ffffffff817c27cd 0000000000000007
[124243.445503] ffff8800805a3b98 ffff8800805a3b88 ffffffff8107593a ffff88013abb93a0
[124243.445506] ffff8801395688c0 ffff8800b8ee0680 ffff8800b8ee1530 ffff8800b8ee1548
[124243.445509] Call Trace:
[124243.445516] [<ffffffff817c27cd>] dump_stack+0x45/0x57
[124243.445520] [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
[124243.445523] [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
[124243.445537] [<ffffffffc05c6947>] ieee80211_do_stop+0x8e7/0x8f0 [mac80211]
[124243.445542] [<ffffffff816e2fb3>] ? dev_deactivate_many+0x213/0x260
[124243.445650] [<ffffffffc05c696a>] ieee80211_stop+0x1a/0x20 [mac80211]
[124243.445654] [<ffffffff816b9145>] __dev_close_many+0x95/0xf0
[124243.445657] [<ffffffff816b9221>] dev_close_many+0x81/0x120
[124243.445660] [<ffffffff816bb7e6>] dev_close.part.68+0x36/0x50
[124243.445663] [<ffffffff816bb821>] dev_close+0x21/0x30
[124243.445681] [<ffffffffc045da5d>] cfg80211_shutdown_all_interfaces+0x4d/0xc0 [cfg80211]
[124243.445699] [<ffffffffc05e11c5>] ieee80211_reconfig+0x325/0x1620 [mac80211]
[124243.445709] [<ffffffffc05b01c2>] ieee80211_restart_work+0x42/0x80 [mac80211]
[124243.445713] [<ffffffff8108eb58>] process_one_work+0x158/0x430
[124243.445716] [<ffffffff8108f69b>] worker_thread+0x5b/0x530
[124243.445719] [<ffffffff8108f640>] ? rescuer_thread+0x3a0/0x3a0
[124243.445723] [<ffffffff81094739>] kthread+0xc9/0xe0
[124243.445726] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[124243.445730] [<ffffffff817c9858>] ret_from_fork+0x58/0x90
[124243.445733] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[124243.445735] ---[ end trace a62a134da66aa279 ]---
[124243.448086] cfg80211: Calling CRDA to update world regulatory domain
[124243.556433] cfg80211: World regulatory domain updated:
[124243.556437] cfg80211: DFS Master region: unset
[124243.556439] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[124243.556443] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[124243.556446] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[124243.556448] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[124243.556451] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[124243.556453] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[133493.814221] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133493.814227] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133493.860919] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133493.860921] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133493.907609] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133493.907612] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133493.954304] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133493.954306] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133494.001001] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133494.001003] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133494.044771] iwl3945 0000:02:00.0: Unable to initialize device after 5 attempts.
[133545.013431] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133545.013438] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133545.060131] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133545.060135] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133545.106823] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133545.106825] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133545.153516] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133545.153519] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133545.200211] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[133545.200213] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[133545.240647] iwl3945 0000:02:00.0: Unable to initialize device after 5 attempts.
---
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: hlorridi 1680 F.... pulseaudio
 /dev/snd/controlC1: hlorridi 1680 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.04
HibernationDevice: RESUME=UUID=d4074c4f-5617-4a98-87e1-9c894f5b75fa
InstallationDate: Installed on 2014-06-12 (350 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: TOSHIBA Satellite P300
Package: linux (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic root=UUID=0f633b72-6188-4117-8517-6773907e19ce ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-18-generic N/A
 linux-backports-modules-3.19.0-18-generic N/A
 linux-firmware 1.143.1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: vivid
Uname: Linux 3.19.0-18-generic x86_64
UpgradeStatus: Upgraded to vivid on 2015-05-16 (12 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 01/05/2009
dmi.bios.vendor: TOSHIBA
dmi.bios.version: V4.20
dmi.board.name: Satellite P300
dmi.board.vendor: TOSHIBA
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvrV4.20:bd01/05/2009:svnTOSHIBA:pnSatelliteP300:pvrPSPC4E-03R015FR:rvnTOSHIBA:rnSatelliteP300:rvrNotApplicable:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.name: Satellite P300
dmi.product.version: PSPC4E-03R015FR
dmi.sys.vendor: TOSHIBA
---
ApportVersion: 2.17.2-0ubuntu1.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: hlorridi 2096 F.... pulseaudio
 /dev/snd/pcmC0D0p: hlorridi 2096 F...m pulseaudio
 /dev/snd/controlC0: hlorridi 2096 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.04
HibernationDevice: RESUME=UUID=d4074c4f-5617-4a98-87e1-9c894f5b75fa
InstallationDate: Installed on 2014-06-12 (454 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: TOSHIBA Satellite P300
Package: linux (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic root=UUID=0f633b72-6188-4117-8517-6773907e19ce ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-28-generic N/A
 linux-backports-modules-3.19.0-28-generic N/A
 linux-firmware 1.143.3
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: vivid
Uname: Linux 3.19.0-28-generic x86_64
UpgradeStatus: Upgraded to vivid on 2015-05-16 (117 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 01/05/2009
dmi.bios.vendor: TOSHIBA
dmi.bios.version: V4.20
dmi.board.name: Satellite P300
dmi.board.vendor: TOSHIBA
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvrV4.20:bd01/05/2009:svnTOSHIBA:pnSatelliteP300:pvrPSPC4E-03R015FR:rvnTOSHIBA:rnSatelliteP300:rvrNotApplicable:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.name: Satellite P300
dmi.product.version: PSPC4E-03R015FR
dmi.sys.vendor: TOSHIBA

[hlorridi (trash-5)]

issue still exists.
wifi crash

dmesg

[ 8032.285863] ------------[ cut here ]------------
[ 8032.285881] WARNING: CPU: 1 PID: 25804 at /build/buildd/linux-3.19.0/net/mac80211/driver-ops.h:12 ieee80211_do_stop+0x8e7/0x8f0 [mac80211]()
[ 8032.285882] wlan0: Failed check-sdata-in-driver check, flags: 0x4
[ 8032.285884] Modules linked in: cpuid ctr ccm snd_hda_codec_hdmi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_h$
[ 8032.285925] CPU: 1 PID: 25804 Comm: kworker/1:2 Tainted: G W 3.19.0-18-generic #18-Ubuntu
[ 8032.285926] Hardware name: TOSHIBA Satellite P300/Satellite P300, BIOS V4.20 01/05/2009
[ 8032.285937] Workqueue: events ieee80211_restart_work [mac80211]
[ 8032.285938] ffffffffc0512768 ffff88012d737b48 ffffffff817c27cd 0000000000000007
[ 8032.285941] ffff88012d737b98 ffff88012d737b88 ffffffff8107593a ffff88013a4093a0
[ 8032.285944] ffff8800bba328c0 ffff8800b8890680 ffff8800b8891530 ffff8800b8891548
[ 8032.285947] Call Trace:
[ 8032.285952] [<ffffffff817c27cd>] dump_stack+0x45/0x57
[ 8032.285955] [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
[ 8032.285957] [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
[ 8032.285971] [<ffffffffc04b1947>] ieee80211_do_stop+0x8e7/0x8f0 [mac80211]
[ 8032.285977] [<ffffffff816e2fb3>] ? dev_deactivate_many+0x213/0x260
[ 8032.285990] [<ffffffffc04b196a>] ieee80211_stop+0x1a/0x20 [mac80211]
[ 8032.285994] [<ffffffff816b9145>] __dev_close_many+0x95/0xf0
[ 8032.285996] [<ffffffff816b9221>] dev_close_many+0x81/0x120
[ 8032.285999] [<ffffffff816bb7e6>] dev_close.part.68+0x36/0x50
[ 8032.286001] [<ffffffff816bb821>] dev_close+0x21/0x30
[ 8032.286015] [<ffffffffc036ca5d>] cfg80211_shutdown_all_interfaces+0x4d/0xc0 [cfg80211]
[ 8032.286031] [<ffffffffc04cc1c5>] ieee80211_reconfig+0x325/0x1620 [mac80211]
[ 8032.286043] [<ffffffffc049b1c2>] ieee80211_restart_work+0x42/0x80 [mac80211]
[ 8032.286045] [<ffffffff8108eb58>] process_one_work+0x158/0x430
[ 8032.286048] [<ffffffff8108f69b>] worker_thread+0x5b/0x530
[ 8032.286051] [<ffffffff8108f640>] ? rescuer_thread+0x3a0/0x3a0
[ 8032.286054] [<ffffffff81094739>] kthread+0xc9/0xe0
[ 8032.286057] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[ 8032.286060] [<ffffffff817c9858>] ret_from_fork+0x58/0x90
[ 8032.286063] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[ 8032.286065] ---[ end trace 3eac86e3392e1eb7 ]---
[ 8032.287650] cfg80211: Calling CRDA to update world regulatory domain
[ 8032.347519] cfg80211: World regulatory domain updated:
[ 8032.347525] cfg80211: DFS Master region: unset
[ 8032.347527] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 8032.347530] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347533] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347536] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347538] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347541] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)...

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.1 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-rc5-unstable/

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1457587

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

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[hlorridi (trash-5)]

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[hlorridi (trash-5)]

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[hlorridi (trash-5)]

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[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

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[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport information

[hlorridi (trash-5)]

apport command done, but currently my wifi is ok. so here is the last kernel log.
look at 'May 24 10:40' that's really funky ;)

thx

[hlorridi (trash-5)]

ops, i've install the rc5 and "Error! Bad return status for module build on kernel: 4.1.0-040100rc5-generic (x86_64)"

linux-headers-4.1.0-040100rc5_4.1.0-040100rc5.201505250235_all.deb linux-image-4.1.0-040100rc5-generic_4.1.0-040100rc5.201505250235_amd64.deb
linux-headers-4.1.0-040100rc5-generic_4.1.0-040100rc5.201505250235_amd64.deb
hlorridi@skuldbook:~/Téléchargements$ sudo dpkg -i linux-*
[sudo] password for hlorridi:
Sélection du paquet linux-headers-4.1.0-040100rc5 précédemment désélectionné.
(Lecture de la base de données... 290056 fichiers et répertoires déjà installés.)
Préparation du dépaquetage de linux-headers-4.1.0-040100rc5_4.1.0-040100rc5.201505250235_all.deb ...
Dépaquetage de linux-headers-4.1.0-040100rc5 (4.1.0-040100rc5.201505250235) ...
Sélection du paquet linux-headers-4.1.0-040100rc5-generic précédemment désélectionné.
Préparation du dépaquetage de linux-headers-4.1.0-040100rc5-generic_4.1.0-040100rc5.201505250235_amd64.deb ...
Dépaquetage de linux-headers-4.1.0-040100rc5-generic (4.1.0-040100rc5.201505250235) ...
Sélection du paquet linux-image-4.1.0-040100rc5-generic précédemment désélectionné.
Préparation du dépaquetage de linux-image-4.1.0-040100rc5-generic_4.1.0-040100rc5.201505250235_amd64.deb ...
Examining /etc/kernel/preinst.d/
run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
Done.
Dépaquetage de linux-image-4.1.0-040100rc5-generic (4.1.0-040100rc5.201505250235) ...
Paramétrage de linux-headers-4.1.0-040100rc5 (4.1.0-040100rc5.201505250235) ...
Paramétrage de linux-headers-4.1.0-040100rc5-generic (4.1.0-040100rc5.201505250235) ...
Examining /etc/kernel/header_postinst.d.
run-parts: executing /etc/kernel/header_postinst.d/dkms 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
Error! Bad return status for module build on kernel: 4.1.0-040100rc5-generic (x86_64)
Consult /var/lib/dkms/virtualbox/4.3.26/build/make.log for more information.
Paramétrage de linux-image-4.1.0-040100rc5-generic (4.1.0-040100rc5.201505250235) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
Error! Bad return status for module build on kernel: 4.1.0-040100rc5-generic (x86_64)
Consult /var/lib/dkms/virtualbox/4.3.26/build/make.log for more information.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
update-initramfs: Generating /boot/initrd.img-4.1.0-040100rc5-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.1.0-040100rc5-generic /boot/vmlinuz-4.1.0-040100rc5-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-g...

[hlorridi (trash-5)]

kernel-bug-exists-upstream tag added :-/

[hlorridi (trash-5)]

any news ?
issue still exists
*3.19.0-20-generic #20-Ubuntu SMP Fri May 29 10:10:47 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux*

[Bob Ryan (x-bob-c)]

I was also having this problem with 3.19.0-20-generic and have upgraded to 4.1.0-040100rc2-generic from kernel-ppa (http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-rc2-vivid/). This appears to have resolved it.

[hlorridi (trash-5)]

seems fixed with the 3.19.0-22-generic

[hlorridi (trash-5)]

hi

sorry but the bug is back

$ uname -a
Linux skuldbook 3.19.0-22-generic #22-Ubuntu SMP Tue Jun 16 17:15:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

[robochat (rjsteed)]

I've also been seeing this bug in kubuntu for about the last 6 months. The wifi actually works when I come directly out of sleep mode but if the computer screen is allowed to lock then afterwards the wifi is broken and journalctl shows errors of the kind
"wlan0: Failed check-sdata-in-driver check, flags: 0x4". I've tried to restart services and modprobe the iwl3945 module but this often crashes the computer. Instead I've found that sending the computer into 'sleep' mode and waking it up will restore the wifi -at least for a while.

$ uname -a
... 3.19.0-26-generic #28-Ubuntu SMP Tue Aug 11 14:16:45 UTC 2015 i686 i686 i686 GNU/Linux

[hlorridi (trash-5)]

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yep, if I reload iwl3945 my computer freeze in a "loop of the death"...

:'(