Comment 0 for bug 2088337

Sometimes, shortly after resuming from sleep (after a few seconds) WiFi becomes non-operational - no network traffic can be sent or received. After a minute or so, WiFi connection becomes disabled and then re-established, but network connectivity does not restore.

In syslog, I can see repeated messages such as these:

2024-11-16T14:42:59.069086+03:00 lastique-n550jv kernel: iwlwifi 0000:04:00.0: Hardware error detected. Restarting.
2024-11-16T14:42:59.069102+03:00 lastique-n550jv kernel: iwlwifi 0000:04:00.0: Loaded firmware version: 17.3216344376.0 7260-17.ucode

...

2024-11-16T14:42:59.070053+03:00 lastique-n550jv kernel: ieee80211 phy0: Hardware restart was requested
2024-11-16T14:43:00.835102+03:00 lastique-n550jv kernel: iwlwifi 0000:04:00.0: Failing on timeout while stopping DMA channel 8 [0xa5a5a5a2]
2024-11-16T14:43:01.110060+03:00 lastique-n550jv kernel: wlp4s0: HW problem - can not stop rx aggregation for 34:97:f6:22:c0:3c tid 0
2024-11-16T14:43:01.110073+03:00 lastique-n550jv kernel: wlp4s0: HW problem - can not stop rx aggregation for 34:97:f6:22:c0:3c tid 1
2024-11-16T14:43:01.880131+03:00 lastique-n550jv kernel: iwlwifi 0000:04:00.0: Hardware error detected. Restarting.
2024-11-16T14:43:01.880144+03:00 lastique-n550jv kernel: iwlwifi 0000:04:00.0: Loaded firmware version: 17.3216344376.0 7260-17.ucode

...

2024-11-16T14:43:39.608098+03:00 lastique-n550jv kernel: ------------[ cut here ]------------
2024-11-16T14:43:39.608112+03:00 lastique-n550jv kernel: iwl_pcie_cmdq_reclaim: Read index for DMA queue txq id (0), index 6 is out of range [0-256] 81 81.
2024-11-16T14:43:39.608113+03:00 lastique-n550jv kernel: WARNING: CPU: 7 PID: 519 at drivers/net/wireless/intel/iwlwifi/pcie/tx.c:664 iwl_pcie_cmdq_reclaim+0x1cd/0x1f0 [iwlwifi]
2024-11-16T14:43:39.608118+03:00 lastique-n550jv kernel: Modules linked in: cmac ccm snd_seq_dummy snd_hrtimer qrtr zram nvidia_uvm(POE) nvidia_drm(POE) nvidia_modeset(POE) ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt ipt_REJECT nf_reject_ipv4 xt_LOG nf_log_syslog xt_comment xt_multiport nft_limit xt_limit xt_addrtype xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel nf_tables snd_hda_codec_hdmi snd_hda_codec_realtek binfmt_misc libcrc32c kvm snd_hda_codec_generic irqbypass iwlmvm crct10dif_pclmul polyval_clmulni polyval_generic ghash_clmulni_intel aesni_intel crypto_simd cryptd nls_iso8859_1 nvidia(POE) rapl i915 snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi mac80211 snd_hda_codec snd_hda_core snd_hwdep uvcvideo snd_pcm videobuf2_vmalloc uvc videobuf2_memops libarc4 spi_nor snd_seq_midi videobuf2_v4l2 snd_seq_midi_event mtd snd_rawmidi at24 videodev btusb iwlwifi btrtl btintel drm_buddy snd_seq rtsx_usb_ms ttm videobuf2_common btbcm
2024-11-16T14:43:39.608123+03:00 lastique-n550jv kernel: spi_intel_platform btmtk i2c_i801 spi_intel mei_hdcp mei_pxp memstick mxm_wmi intel_cstate mfd_aaeon mc drm_display_helper snd_seq_device cfg80211 i2c_smbus snd_timer bluetooth lpc_ich cec mei_me ecdh_generic rc_core snd ecc i2c_algo_bit mei soundcore asus_wireless joydev input_leds serio_raw mac_hid sch_fq tcp_yeah tcp_vegas coda asus_nb_wmi asus_wmi ledtrig_audio sparse_keymap platform_profile sha256_ssse3 sha1_ssse3 msr parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 rtsx_usb_sdmmc rtsx_usb crc32_pclmul psmouse ahci r8169 libahci realtek xhci_pci xhci_pci_renesas video wmi
2024-11-16T14:43:39.608124+03:00 lastique-n550jv kernel: CPU: 7 PID: 519 Comm: irq/42-iwlwifi Tainted: P OE 6.8.0-47-lowlatency #47.1-Ubuntu
2024-11-16T14:43:39.608125+03:00 lastique-n550jv kernel: Hardware name: ASUSTeK COMPUTER INC. N550JV/N550JV, BIOS N550JV.208 11/19/2013
2024-11-16T14:43:39.608126+03:00 lastique-n550jv kernel: RIP: 0010:iwl_pcie_cmdq_reclaim+0x1cd/0x1f0 [iwlwifi]
2024-11-16T14:43:39.608127+03:00 lastique-n550jv kernel: Code: ea c6 05 09 a9 03 00 01 48 c7 c6 f0 1f ce c0 48 c7 c7 f0 1a cf c0 48 8b 00 44 8b 40 0c 41 8b 86 a4 00 00 00 50 e8 53 48 28 e4 <0f> 0b 58 e9 78 ff ff ff 48 c7 c7 60 fd ca c0 48 89 75 d0 e8 db 3d
2024-11-16T14:43:39.608128+03:00 lastique-n550jv kernel: RSP: 0018:ffffb645c02cccd8 EFLAGS: 00010246
2024-11-16T14:43:39.608129+03:00 lastique-n550jv kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
2024-11-16T14:43:39.608129+03:00 lastique-n550jv kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
2024-11-16T14:43:39.608141+03:00 lastique-n550jv kernel: RBP: ffffb645c02ccd10 R08: 0000000000000000 R09: 0000000000000000
2024-11-16T14:43:39.608142+03:00 lastique-n550jv kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffff92c659cd0028
2024-11-16T14:43:39.608143+03:00 lastique-n550jv kernel: R13: 0000000000000000 R14: ffff92c65bc62000 R15: 0000000000000006
2024-11-16T14:43:39.608144+03:00 lastique-n550jv kernel: FS: 0000000000000000(0000) GS:ffff92c95ed80000(0000) knlGS:0000000000000000
2024-11-16T14:43:39.608145+03:00 lastique-n550jv kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2024-11-16T14:43:39.608146+03:00 lastique-n550jv kernel: CR2: 0000710728011b00 CR3: 0000000155e3c002 CR4: 00000000001706f0
2024-11-16T14:43:39.608147+03:00 lastique-n550jv kernel: Call Trace:
2024-11-16T14:43:39.608148+03:00 lastique-n550jv kernel: <IRQ>
2024-11-16T14:43:39.608149+03:00 lastique-n550jv kernel: ? show_regs+0x6d/0x80
2024-11-16T14:43:39.608150+03:00 lastique-n550jv kernel: ? __warn+0x89/0x160
2024-11-16T14:43:39.608151+03:00 lastique-n550jv kernel: ? iwl_pcie_cmdq_reclaim+0x1cd/0x1f0 [iwlwifi]
2024-11-16T14:43:39.608151+03:00 lastique-n550jv kernel: ? report_bug+0x17e/0x1b0
2024-11-16T14:43:39.608152+03:00 lastique-n550jv kernel: ? handle_bug+0x51/0xa0
2024-11-16T14:43:39.608153+03:00 lastique-n550jv kernel: ? exc_invalid_op+0x18/0x80
2024-11-16T14:43:39.608154+03:00 lastique-n550jv kernel: ? asm_exc_invalid_op+0x1b/0x20
2024-11-16T14:43:39.608155+03:00 lastique-n550jv kernel: ? iwl_pcie_cmdq_reclaim+0x1cd/0x1f0 [iwlwifi]
2024-11-16T14:43:39.608156+03:00 lastique-n550jv kernel: ? iwl_pcie_cmdq_reclaim+0x1cd/0x1f0 [iwlwifi]
2024-11-16T14:43:39.608159+03:00 lastique-n550jv kernel: iwl_pcie_hcmd_complete+0xf0/0x2e0 [iwlwifi]
2024-11-16T14:43:39.608160+03:00 lastique-n550jv kernel: iwl_pcie_rx_handle_rb.isra.0+0x35a/0x490 [iwlwifi]
2024-11-16T14:43:39.608161+03:00 lastique-n550jv kernel: iwl_pcie_rx_handle+0x21c/0x640 [iwlwifi]
2024-11-16T14:43:39.608162+03:00 lastique-n550jv kernel: iwl_pcie_napi_poll+0x2e/0x150 [iwlwifi]
2024-11-16T14:43:39.608162+03:00 lastique-n550jv kernel: __napi_poll+0x33/0x200
2024-11-16T14:43:39.608163+03:00 lastique-n550jv kernel: net_rx_action+0x181/0x2e0
2024-11-16T14:43:39.608164+03:00 lastique-n550jv kernel: handle_softirqs+0xdb/0x340
2024-11-16T14:43:39.608165+03:00 lastique-n550jv kernel: ? handle_irq_event+0x52/0x80
2024-11-16T14:43:39.608166+03:00 lastique-n550jv kernel: __do_softirq+0x10/0x18
2024-11-16T14:43:39.608167+03:00 lastique-n550jv kernel: do_softirq.part.0+0x41/0x80
2024-11-16T14:43:39.608168+03:00 lastique-n550jv kernel: </IRQ>
2024-11-16T14:43:39.608169+03:00 lastique-n550jv kernel: <TASK>
2024-11-16T14:43:39.608170+03:00 lastique-n550jv kernel: __local_bh_enable_ip+0x72/0x80
2024-11-16T14:43:39.608171+03:00 lastique-n550jv kernel: iwl_pcie_irq_handler+0x4df/0xb70 [iwlwifi]
2024-11-16T14:43:39.608171+03:00 lastique-n550jv kernel: ? __pfx_irq_thread_fn+0x10/0x10
2024-11-16T14:43:39.608172+03:00 lastique-n550jv kernel: irq_thread_fn+0x24/0x70
2024-11-16T14:43:39.608173+03:00 lastique-n550jv kernel: irq_thread+0xfb/0x1c0
2024-11-16T14:43:39.608174+03:00 lastique-n550jv kernel: ? __pfx_irq_thread_dtor+0x10/0x10
2024-11-16T14:43:39.608175+03:00 lastique-n550jv kernel: ? __pfx_irq_thread+0x10/0x10
2024-11-16T14:43:39.608176+03:00 lastique-n550jv kernel: kthread+0xf2/0x120
2024-11-16T14:43:39.608177+03:00 lastique-n550jv kernel: ? __pfx_kthread+0x10/0x10
2024-11-16T14:43:39.608177+03:00 lastique-n550jv kernel: ret_from_fork+0x47/0x70
2024-11-16T14:43:39.608178+03:00 lastique-n550jv kernel: ? __pfx_kthread+0x10/0x10
2024-11-16T14:43:39.608179+03:00 lastique-n550jv kernel: ret_from_fork_asm+0x1b/0x30
2024-11-16T14:43:39.608180+03:00 lastique-n550jv kernel: </TASK>
2024-11-16T14:43:39.608181+03:00 lastique-n550jv kernel: ---[ end trace 0000000000000000 ]---

The only way to restore network connectivity is to reboot the system.

This is a regression in Kubuntu 24.04, this did not happen with Kubuntu 22.04 on the same system. The system is an ASUS N550JV laptop with Intel Wireless-AC 7260 WiFi adapter.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-47-lowlatency 6.8.0-47.47.1
ProcVersionSignature: Ubuntu 6.8.0-47.47.1-lowlatency 6.8.12
Uname: Linux 6.8.0-47-lowlatency x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Nov 16 14:46:40 2024
InstallationDate: Installed on 2013-10-11 (4054 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: linux-signed-lowlatency
UpgradeStatus: Upgraded to noble on 2024-09-04 (73 days ago)
modified.conffile..etc.init.d.apport: [modified]
mtime.conffile..etc.init.d.apport: 2024-07-22T17:59:07