Hi, Sorry for the top-post, wanted to push this to the top but also: If you haven't already, please file a bug on bugzilla.kernel.org and assign to/CC linuxwifi@xxxxxxxxx johannes On Fri, 2018-12-07 at 13:29 +0100, Ferry wrote: > 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 > >
