Freezes on hibernate sometimes and other times at random when using EAP/PEAP network. Disconnects/crash on EAP/PEAP network randomly

Bug #1888155 reported by Lily Rivers
This bug affects 2 people
Affects Status Importance Assigned to Milestone
rtl8821ce (Ubuntu)

Bug Description

Release is mint 20, Ubuntu 20.04.
Version of the package is
The machine should not freeze and not even accept sysreq input. The driver should not crash.
The machine freezes on hibernate randomly, disconnects randomly from PEAP/EAP networks. This also happens with the driver version from on 5.4.0-40-generic

Revision history for this message
Lily Rivers (lilyrivers48) wrote :
Revision history for this message
You-Sheng Yang (vicamo) wrote :
tags: added: hwe-networking-wifi
Revision history for this message
Lily Rivers (lilyrivers48) wrote :

Ah sorry, I checked with the github version again on 5.4.0-40-generic and it still happens. I'll update there too. I think it was better on old kernel versions, i.e, it didn't bring the whole system down on hibernate etc.

description: updated
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in rtl8821ce (Ubuntu):
status: New → Confirmed
Revision history for this message
RevEggplant (rrclark) wrote :
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I'm seeing problem on an HP 15-da1009cy laptop. I've tried both the Ubuntu package rtl8821ce-dkms version and the code from Both result in a module that crashes intermittently.

Crashes result in following log entries:
[FSep 3 12:05:27 TheDude wpa_supplicant[699]: wlo1: Trying to associate with 4c:01:43:71:b6:18 (SSID='The Pipeline' freq=5200 MHz)
Sep 3 12:05:27 TheDude kernel: [ 2200.706812] ------------[ cut here ]------------
Sep 3 12:05:27 TheDude kernel: [ 2200.706937] WARNING: CPU: 6 PID: 813 at /var/lib/dkms/rtl8821ce/ rtw_get_scch_by_cch_offset+0x54/0x92 [rtl8821ce]
Sep 3 12:05:27 TheDude kernel: [ 2200.706939] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache snd_sof_pci snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda snd_sof_intel_byt snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel mei_hdcp snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep intel_rapl_msr snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_seq uvcvideo videobuf2_vmalloc kvm videobuf2_memops snd_seq_device rapl videobuf2_v4l2 rndis_host videobuf2_common rtl8821ce(OE) nls_iso8859_1 intel_cstate cdc_ether joydev snd_timer videodev input_leds usbnet mc hp_wmi serio_raw wmi_bmof mii intel_wmi_thunderbolt sparse_keymap snd hid_multitouch mei_me cfg80211 processor_thermal_device soundcore mei intel_rapl_common intel_soc_dts_iosf
Sep 3 12:05:27 TheDude kernel: [ 2200.707003] intel_pch_thermal int3403_thermal int340x_thermal_zone int3400_thermal hp_wireless acpi_thermal_rel mac_hid acpi_tad acpi_pad sch_fq_codel parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c dm_mirror dm_region_hash dm_log hid_generic usbhid hid i915 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i2c_algo_bit crypto_simd drm_kms_helper nvme syscopyarea sysfillrect cryptd sysimgblt psmouse glue_helper fb_sys_fops drm nvme_core r8169 i2c_i801 ahci realtek libahci wmi video
Sep 3 12:05:27 TheDude kernel: [ 2200.707060] CPU: 6 PID: 813 Comm: RTW_CMD_THREAD Tainted: G W OE 5.4.0-45-generic #49-Ubuntu
Sep 3 12:05:27 TheDude kernel: [ 2200.707063] Hardware name: HP HP Laptop 15-da1xxx/8532, BIOS F.23 11/29/2019
Sep 3 12:05:27 TheDude kernel: [ 2200.707163] RIP: 0010:rtw_get_scch_by_cch_offset+0x54/0x92 [rtl8821ce]
Sep 3 12:05:27 TheDude kernel: [ 2200.707169] Code: 71 77 06 40 80 fe 03 74 35 8d 47 d6 3c 81 77 06 40 80 fe 02 74 36 8d 47 da 3c 89 77 04 84 c9 75 39 0f 0b b8 00 00 00 00 5d c3 <0f> 0b 89 d0 eb f8 8d 47 02 83 ef 02 80 fa 02 0f 45 c7 eb ea 8d 47
Sep 3 12:05:27 TheDude kernel: [ 2200.707172] RSP: 0018:ffffbb63809dfdb8 EFLAGS: 00010246
Sep 3 12:05:27 TheDude kernel: [ 2200.707176] RAX: 0000000000000026 RBX: ffffbb638050c000 RCX: 0000000000000000
Sep 3 12:05:27 TheDude kernel: [ 2200.707178] RDX: 0000000000000000 RSI: 00000...

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