Hi, I have a Dell XPS 15 9550 in which I replaced the wireless Broadcom adapter with an Intel 9260. So far I have not encountered any issues whatsoever with WPA(2)-PSK networks, but I do have issues connecting to WPA(2)-EAP networks (at least eduroam here, which uses TTLS / MSCHAPv2), which I did not have with the Broadcom 43602 originally in the system). On this machine I run gentoo linux (~amd64) with KDE/plasma. That said, we've seen similar issues (they appear identical even though other model Intel AC adapters) with several other machines containing Intel AC adapters on Fedora 28 with various kernel releases as well when trying to connect to the same network / with same credentials. Unfortunately I don't have the modelnumbers at hand. The issues seem to have been around for a while. On one of the other machines the issues did not occur with a 4.16 kernel (think I tested with 4.16.16 then). The issue is not consistent. That is, every 1 or 2 out of 10 boots, it'll will just work. This does seem to be somewhat hardware related, on my machine it mostly does not work, on some others we see different numbers, some mostly work but show the same behavious on occasion. The messages below don't appear in the logs when it does work. In both cases (gentoo / fedora) NetworkManager is used to connect to the network. Hope someone can help resolve this. I can build kernels / apply patches / aid with debugging, but I'm not a developer. Attached is dmesg from clean boot after several connection attempts. Basically repeats the following quite a few times: [ 82.169103] BUG: scheduling while atomic: irq/124-iwlwifi/266/0x00000400 [ 82.169106] Modules linked in: dm_crypt algif_skcipher x86_pkg_temp_thermal uvcvideo kvm_intel videobuf2_vmalloc videobuf2_memops iwlmvm videobuf2_v4l2 kvm irqbypass crc32_pclmul dell_smbios ghash_clmulni_intel intel_wmi_thunderbolt dell_wmi_descriptor videodev hid_multitouch btusb btrtl iwlwifi snd_hda_codec_hdmi videobuf2_common snd_hda_codec_realtek btbcm btintel bluetooth intel_hid [ 82.169120] CPU: 2 PID: 266 Comm: irq/124-iwlwifi Tainted: G W 4.19.7-gentoo #1 [ 82.169121] Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 1.9.0 10/11/2018 [ 82.169123] Call Trace: [ 82.169144] dump_stack+0x46/0x60 [ 82.169147] __schedule_bug.cold.97+0x5/0x1d [ 82.169149] __schedule+0x4f6/0x730 [ 82.169151] schedule+0x23/0x70 [ 82.169153] schedule_timeout+0x179/0x370 [ 82.169156] ? __next_timer_interrupt+0xc0/0xc0 [ 82.169161] iwl_trans_pcie_send_hcmd+0x316/0x550 [iwlwifi] [ 82.169163] ? wait_woken+0x80/0x80 [ 82.169166] iwl_trans_send_cmd+0x59/0xc0 [iwlwifi] [ 82.169171] iwl_mvm_send_cmd+0x1e/0x70 [iwlmvm] [ 82.169174] ? rs_fill_lq_cmd+0x24b/0x3d0 [iwlmvm] [ 82.169177] iwl_mvm_send_lq_cmd+0x6e/0x90 [iwlmvm] [ 82.169181] iwl_mvm_rs_rate_init+0x913/0xcb0 [iwlmvm] [ 82.169184] iwl_mvm_rs_tx_status+0x39d/0x1f80 [iwlmvm] [ 82.169186] ? enqueue_task_fair+0x3fa/0xfb0 [ 82.169188] ? enqueue_task_fair+0x3fa/0xfb0 [ 82.169190] rate_control_tx_status+0x99/0xa0 [ 82.169193] __ieee80211_tx_status+0x3b5/0x7b0 [ 82.169196] ? iwl_trans_pcie_set_pmi+0x20/0x20 [iwlwifi] [ 82.169198] ? sta_info_hash_lookup+0xe1/0x120 [ 82.169200] ieee80211_tx_status+0x7c/0xb0 [ 82.169203] iwl_mvm_rx_tx_cmd+0x2da/0x710 [iwlmvm] [ 82.169206] ? iwl_pcie_gen2_tx_init+0x130/0x130 [iwlwifi] [ 82.169209] iwl_pcie_rx_handle+0x276/0x9f0 [iwlwifi] [ 82.169211] ? irq_forced_thread_fn+0x70/0x70 [ 82.169213] iwl_pcie_irq_rx_msix_handler+0x52/0xf0 [iwlwifi] [ 82.169215] ? irq_forced_thread_fn+0x70/0x70 [ 82.169216] irq_thread_fn+0x1c/0x60 [ 82.169218] irq_thread+0xe2/0x160 [ 82.169219] ? wake_threads_waitq+0x30/0x30 [ 82.169221] ? irq_thread_dtor+0x80/0x80 [ 82.169223] kthread+0x10e/0x130 [ 82.169225] ? kthread_create_worker_on_cpu+0x60/0x60 [ 82.169226] ret_from_fork+0x35/0x40 [ 84.175959] iwlwifi 0000:02:00.0: Error sending LQ_CMD: time out after 2000ms. [ 84.175963] iwlwifi 0000:02:00.0: Current CMD queue read_ptr 146 write_ptr 147 [ 84.176074] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x1. [ 84.176102] iwlwifi 0000:02:00.0: Loaded firmware version: 38.755cfdd8.0 [ 84.176103] iwlwifi 0000:02:00.0: 0x00000000 | ADVANCED_SYSASSERT [ 84.176105] iwlwifi 0000:02:00.0: 0x00000000 | trm_hw_status0 [ 84.176106] iwlwifi 0000:02:00.0: 0x00000000 | trm_hw_status1 [ 84.176120] iwlwifi 0000:02:00.0: 0x00000000 | branchlink2 [ 84.176121] iwlwifi 0000:02:00.0: 0x0045E90E | interruptlink1 [ 84.176123] iwlwifi 0000:02:00.0: 0x00000A42 | interruptlink2 [ 84.176124] iwlwifi 0000:02:00.0: 0x00000000 | data1 [ 84.176125] iwlwifi 0000:02:00.0: 0xFF000000 | data2 [ 84.176126] iwlwifi 0000:02:00.0: 0xF0000008 | data3 [ 84.176127] iwlwifi 0000:02:00.0: 0x2241419C | beacon time [ 84.176128] iwlwifi 0000:02:00.0: 0xB2A1AA66 | tsf low [ 84.176130] iwlwifi 0000:02:00.0: 0x0000047D | tsf hi [ 84.176131] iwlwifi 0000:02:00.0: 0x00000000 | time gp1 [ 84.176132] iwlwifi 0000:02:00.0: 0x018424AE | time gp2 [ 84.176133] iwlwifi 0000:02:00.0: 0x00000001 | uCode revision type [ 84.176134] iwlwifi 0000:02:00.0: 0x00000026 | uCode version major [ 84.176136] iwlwifi 0000:02:00.0: 0x755CFDD8 | uCode version minor [ 84.176137] iwlwifi 0000:02:00.0: 0x00000321 | hw version [ 84.176138] iwlwifi 0000:02:00.0: 0x00C89004 | board version [ 84.176139] iwlwifi 0000:02:00.0: 0x0092014E | hcmd [ 84.176140] iwlwifi 0000:02:00.0: 0x24022000 | isr0 [ 84.176141] iwlwifi 0000:02:00.0: 0x11800000 | isr1 [ 84.176142] iwlwifi 0000:02:00.0: 0x08001802 | isr2 [ 84.176144] iwlwifi 0000:02:00.0: 0x00417CC0 | isr3 [ 84.176145] iwlwifi 0000:02:00.0: 0x00000000 | isr4 [ 84.176146] iwlwifi 0000:02:00.0: 0x0092014E | last cmd Id [ 84.176147] iwlwifi 0000:02:00.0: 0x00000000 | wait_event [ 84.176148] iwlwifi 0000:02:00.0: 0x00000080 | l2p_control [ 84.176149] iwlwifi 0000:02:00.0: 0x00010034 | l2p_duration [ 84.176151] iwlwifi 0000:02:00.0: 0x0000003F | l2p_mhvalid [ 84.176152] iwlwifi 0000:02:00.0: 0x000000CE | l2p_addr_match [ 84.176153] iwlwifi 0000:02:00.0: 0x0000000D | lmpm_pmg_sel [ 84.176154] iwlwifi 0000:02:00.0: 0x04071046 | timestamp [ 84.176155] iwlwifi 0000:02:00.0: 0x00340038 | flow_handler [ 84.176194] iwlwifi 0000:02:00.0: Start IWL Error Log Dump: [ 84.176195] iwlwifi 0000:02:00.0: Status: 0x00000100, count: 7 [ 84.176197] iwlwifi 0000:02:00.0: 0x00000066 | NMI_INTERRUPT_HOST [ 84.176198] iwlwifi 0000:02:00.0: 0x00000000 | umac branchlink1 [ 84.176199] iwlwifi 0000:02:00.0: 0xC0087CB8 | umac branchlink2 [ 84.176200] iwlwifi 0000:02:00.0: 0xC0083A20 | umac interruptlink1 [ 84.176202] iwlwifi 0000:02:00.0: 0xC0083A20 | umac interruptlink2 [ 84.176203] iwlwifi 0000:02:00.0: 0x01000000 | umac data1 [ 84.176204] iwlwifi 0000:02:00.0: 0xC0083A20 | umac data2 [ 84.176205] iwlwifi 0000:02:00.0: 0xDEADBEEF | umac data3 [ 84.176206] iwlwifi 0000:02:00.0: 0x00000026 | umac major [ 84.176207] iwlwifi 0000:02:00.0: 0x755CFDD8 | umac minor [ 84.176209] iwlwifi 0000:02:00.0: 0xC0886298 | frame pointer [ 84.176210] iwlwifi 0000:02:00.0: 0xC0886298 | stack pointer [ 84.176211] iwlwifi 0000:02:00.0: 0x0092014E | last host cmd [ 84.176212] iwlwifi 0000:02:00.0: 0x00000000 | isr status reg [ 84.176214] ieee80211 phy0: Hardware restart was requested
Attachment:
dmesg.xz
Description: application/xz
