>From comment #5, you're running rtl8821ce-dkms dkms driver, not in-
kernel modules. And this is rooted in driver init failure:
mar 30 10:23:56 IdeaPad-L340 kernel: ------------[ cut here ]------------
mar 30 10:23:56 IdeaPad-L340 kernel: proc_dir_entry 'net/rtl8821ce' already
registered
mar 30 10:23:56 IdeaPad-L340 kernel: WARNING: CPU: 4 PID: 444 at
fs/proc/generic.c:381 proc_register+0x86/0x100
mar 30 10:23:56 IdeaPad-L340 kernel: Modules linked in: kvm_intel(+)
rtl8821ce(OE+) snd_pcm kvm snd_seq_midi snd_seq_midi_event i915
crct10dif_pclmul snd_rawmidi ghash_clmulni_intel aesni_intel uvcvideo btusb
crypto_simd cryptd glue_helper snd_seq btrtl snd_seq_device rapl
videobuf2_vmalloc btbcm 8821ce(OE) intel_cstate intel_wmi_thunderbolt serio_raw
wmi_bmof efi_pstore snd_timer videobuf2_memops drm_kms_helper btintel
videobuf2_v4l2 processor_thermal_device videobuf2_common processor_thermal_rfim
cec bluetooth snd videodev processor_thermal_mbox i2c_algo_bit rc_core
input_leds joydev processor_thermal_rapl fb_sys_fops mei_me ecdh_generic
cfg80211 syscopyarea 8250_dw intel_rapl_common mc soundcore ecc sysfillrect
intel_soc_dts_iosf mei intel_pch_thermal elan_i2c sysimgblt mac_hid
ideapad_laptop sparse_keymap int3403_thermal int340x_thermal_zone
int3400_thermal acpi_tad acpi_pad acpi_thermal_rel sch_fq_codel msr parport_pc
ppdev lp parport drm sunrpc ip_tables x_tables autofs4 hid_generic usbhid
crc32_pclmul
mar 30 10:23:56 IdeaPad-L340 kernel: r8169 realtek ahci nvme intel_lpss_pci
intel_lpss libahci i2c_hid i2c_i801 xhci_pci idma64 i2c_smbus nvme_core
virt_dma xhci_pci_renesas hid wmi video pinctrl_cannonlake
mar 30 10:23:56 IdeaPad-L340 kernel: CPU: 4 PID: 444 Comm: systemd-udevd
Tainted: P OE 5.11.0-11-generic #12-Ubuntu
mar 30 10:23:56 IdeaPad-L340 kernel: Hardware name: LENOVO 81LK/LNVNB161216,
BIOS BGCN33WW 11/24/2020
mar 30 10:23:56 IdeaPad-L340 kernel: RIP: 0010:proc_register+0x86/0x100
mar 30 10:23:56 IdeaPad-L340 kernel: Code: c6 05 65 87 09 02 00 4c 89 e0 5b 41
5c 5d c3 49 8b 94 24 a0 00 00 00 48 8b b3 a0 00 00 00 48 c7 c7 30 78 5e 93 e8
43 60 80 00 <0f> 0b c6 05 39 87 09 02 00 41 8b 44 24 5c 48 c7 c7 10 df e0 93 8d
mar 30 10:23:56 IdeaPad-L340 kernel: RSP: 0018:ffffb174414dfcf0 EFLAGS: 00010286
mar 30 10:23:56 IdeaPad-L340 kernel: RAX: 0000000000000000 RBX:
ffff919b41239a80 RCX: ffff919ca6318ac8
mar 30 10:23:56 IdeaPad-L340 kernel: RDX: 00000000ffffffd8 RSI:
0000000000000027 RDI: ffff919ca6318ac0
mar 30 10:23:56 IdeaPad-L340 kernel: RBP: ffffb174414dfd00 R08:
0000000000000000 R09: ffffb174414dfad0
mar 30 10:23:56 IdeaPad-L340 kernel: R10: ffffb174414dfac8 R11:
ffffffff93d53508 R12: ffff919b44bd8c00
mar 30 10:23:56 IdeaPad-L340 kernel: R13: ffff919b463f22e0 R14:
0000000000000000 R15: ffffffffc183fe40
mar 30 10:23:56 IdeaPad-L340 kernel: FS: 00007fb0bf69c8c0(0000)
GS:ffff919ca6300000(0000) knlGS:0000000000000000
mar 30 10:23:56 IdeaPad-L340 kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
mar 30 10:23:56 IdeaPad-L340 kernel: CR2: 0000555a7bc00000 CR3:
000000010cc90004 CR4: 00000000003706e0
mar 30 10:23:56 IdeaPad-L340 kernel: Call Trace:
mar 30 10:23:56 IdeaPad-L340 kernel: ? 0xffffffffc1885000
mar 30 10:23:56 IdeaPad-L340 kernel: proc_mkdir_data+0x6d/0x90
mar 30 10:23:56 IdeaPad-L340 kernel: rtw_drv_proc_init+0x3b/0xc8 [rtl8821ce]
mar 30 10:23:56 IdeaPad-L340 kernel: ? 0xffffffffc1885000
mar 30 10:23:56 IdeaPad-L340 kernel: rtw_drv_entry+0x28/0x1000 [rtl8821ce]
mar 30 10:23:56 IdeaPad-L340 kernel: do_one_initcall+0x48/0x1d0
mar 30 10:23:56 IdeaPad-L340 kernel: ? kmem_cache_alloc_trace+0xf6/0x200
mar 30 10:23:56 IdeaPad-L340 kernel: ? do_init_module+0x28/0x290
mar 30 10:23:56 IdeaPad-L340 kernel: do_init_module+0x62/0x290
mar 30 10:23:56 IdeaPad-L340 kernel: load_module+0x6f3/0x770
mar 30 10:23:56 IdeaPad-L340 kernel: __do_sys_finit_module+0xc2/0x120
mar 30 10:23:56 IdeaPad-L340 kernel: __x64_sys_finit_module+0x1a/0x20
mar 30 10:23:56 IdeaPad-L340 kernel: do_syscall_64+0x38/0x90
mar 30 10:23:56 IdeaPad-L340 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
mar 30 10:23:56 IdeaPad-L340 kernel: RIP: 0033:0x7fb0bfb52edd
mar 30 10:23:56 IdeaPad-L340 kernel: Code: 29 0d 00 0f 05 eb a9 66 0f 1f 44 00
00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c
24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 5b df 0c 00 f7 d8 64 89 01 48
mar 30 10:23:56 IdeaPad-L340 kernel: RSP: 002b:00007ffeed5aa538 EFLAGS:
00000246 ORIG_RAX: 0000000000000139
mar 30 10:23:56 IdeaPad-L340 kernel: RAX: ffffffffffffffda RBX:
00005565f93cea70 RCX: 00007fb0bfb52edd
mar 30 10:23:56 IdeaPad-L340 kernel: RDX: 0000000000000000 RSI:
00007fb0bfcf9e2d RDI: 0000000000000010
mar 30 10:23:56 IdeaPad-L340 kernel: RBP: 0000000000020000 R08:
0000000000000000 R09: 00005565f815089d
mar 30 10:23:56 IdeaPad-L340 kernel: R10: 0000000000000010 R11:
0000000000000246 R12: 00007fb0bfcf9e2d
mar 30 10:23:56 IdeaPad-L340 kernel: R13: 0000000000000000 R14:
00005565f93bcd50 R15: 00005565f93cea70
mar 30 10:23:56 IdeaPad-L340 kernel: ---[ end trace 5056a774b515d7ff ]---
mar 30 10:23:56 IdeaPad-L340 kernel: ------------[ cut here ]------------
mar 30 10:23:56 IdeaPad-L340 kernel: WARNING: CPU: 4 PID: 444 at
/var/lib/dkms/rtl8821ce/5.5.2.1/build/os_dep/linux/rtw_proc.c:296
rtw_drv_proc_init+0x54/0xc8 [rtl8821ce]
mar 30 10:23:56 IdeaPad-L340 kernel: Modules linked in: fjes(+) kvm_intel(+)
rtl8821ce(OE+) snd_pcm kvm snd_seq_midi snd_seq_midi_event i915
crct10dif_pclmul snd_rawmidi ghash_clmulni_intel aesni_intel uvcvideo btusb
crypto_simd cryptd glue_helper snd_seq btrtl snd_seq_device rapl
videobuf2_vmalloc btbcm 8821ce(OE) intel_cstate intel_wmi_thunderbolt serio_raw
wmi_bmof efi_pstore snd_timer videobuf2_memops drm_kms_helper btintel
videobuf2_v4l2 processor_thermal_device videobuf2_common processor_thermal_rfim
cec bluetooth snd videodev processor_thermal_mbox i2c_algo_bit rc_core
input_leds joydev processor_thermal_rapl fb_sys_fops mei_me ecdh_generic
cfg80211 syscopyarea 8250_dw intel_rapl_common mc soundcore ecc sysfillrect
intel_soc_dts_iosf mei intel_pch_thermal elan_i2c sysimgblt mac_hid
ideapad_laptop sparse_keymap int3403_thermal int340x_thermal_zone
int3400_thermal acpi_tad acpi_pad acpi_thermal_rel sch_fq_codel msr parport_pc
ppdev lp parport drm sunrpc ip_tables x_tables autofs4 hid_generic usbhid
mar 30 10:23:56 IdeaPad-L340 kernel: crc32_pclmul r8169 realtek ahci nvme
intel_lpss_pci intel_lpss libahci i2c_hid i2c_i801 xhci_pci idma64 i2c_smbus
nvme_core virt_dma xhci_pci_renesas hid wmi video pinctrl_cannonlake
mar 30 10:23:56 IdeaPad-L340 kernel: CPU: 4 PID: 444 Comm: systemd-udevd
Tainted: P W OE 5.11.0-11-generic #12-Ubuntu
mar 30 10:23:56 IdeaPad-L340 kernel: Hardware name: LENOVO 81LK/LNVNB161216,
BIOS BGCN33WW 11/24/2020
mar 30 10:23:56 IdeaPad-L340 kernel: RIP: 0010:rtw_drv_proc_init+0x54/0xc8
[rtl8821ce]
mar 30 10:23:56 IdeaPad-L340 kernel: Code: be 6d 01 00 00 48 c7 c7 c7 a6 7d c1
e8 76 13 c9 d0 48 89 05 6f 76 10 00 48 c7 c3 c0 6d 7c c1 41 bc 00 00 00 00 48
85 c0 75 55 <0f> 0b eb 6b 4d 89 e0 48 c7 c1 40 6d 7c c1 48 8b 15 48 76 10 00 be
mar 30 10:23:56 IdeaPad-L340 kernel: RSP: 0018:ffffb174414dfd38 EFLAGS: 00010246
mar 30 10:23:56 IdeaPad-L340 kernel: RAX: 0000000000000000 RBX:
ffffffffc17c6dc0 RCX: 0000000000000080
mar 30 10:23:56 IdeaPad-L340 kernel: RDX: 000000000000007f RSI:
ffffffff923d10a2 RDI: 00000000000325c0
mar 30 10:23:56 IdeaPad-L340 kernel: RBP: ffffb174414dfd48 R08:
0000000000000000 R09: ffffb174414dfad0
mar 30 10:23:56 IdeaPad-L340 kernel: R10: ffffb174414dfac8 R11:
ffffffff93d53508 R12: 0000000000000000
mar 30 10:23:56 IdeaPad-L340 kernel: R13: ffff919b463f22e0 R14:
0000000000000000 R15: ffffffffc183fe40
mar 30 10:23:56 IdeaPad-L340 kernel: FS: 00007fb0bf69c8c0(0000)
GS:ffff919ca6300000(0000) knlGS:0000000000000000
mar 30 10:23:56 IdeaPad-L340 kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
mar 30 10:23:56 IdeaPad-L340 kernel: CR2: 0000555a7bc00000 CR3:
000000010cc90004 CR4: 00000000003706e0
mar 30 10:23:56 IdeaPad-L340 kernel: Call Trace:
mar 30 10:23:56 IdeaPad-L340 kernel: ? 0xffffffffc1885000
mar 30 10:23:56 IdeaPad-L340 kernel: rtw_drv_entry+0x28/0x1000 [rtl8821ce]
mar 30 10:23:56 IdeaPad-L340 kernel: do_one_initcall+0x48/0x1d0
mar 30 10:23:56 IdeaPad-L340 kernel: ? kmem_cache_alloc_trace+0xf6/0x200
mar 30 10:23:56 IdeaPad-L340 kernel: ? do_init_module+0x28/0x290
mar 30 10:23:56 IdeaPad-L340 kernel: do_init_module+0x62/0x290
mar 30 10:23:56 IdeaPad-L340 kernel: load_module+0x6f3/0x770
mar 30 10:23:56 IdeaPad-L340 kernel: __do_sys_finit_module+0xc2/0x120
mar 30 10:23:56 IdeaPad-L340 kernel: __x64_sys_finit_module+0x1a/0x20
mar 30 10:23:56 IdeaPad-L340 kernel: do_syscall_64+0x38/0x90
mar 30 10:23:56 IdeaPad-L340 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
mar 30 10:23:56 IdeaPad-L340 kernel: RIP: 0033:0x7fb0bfb52edd
mar 30 10:23:56 IdeaPad-L340 kernel: Code: 29 0d 00 0f 05 eb a9 66 0f 1f 44 00
00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c
24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 5b df 0c 00 f7 d8 64 89 01 48
mar 30 10:23:56 IdeaPad-L340 kernel: RSP: 002b:00007ffeed5aa538 EFLAGS:
00000246 ORIG_RAX: 0000000000000139
mar 30 10:23:56 IdeaPad-L340 kernel: RAX: ffffffffffffffda RBX:
00005565f93cea70 RCX: 00007fb0bfb52edd
mar 30 10:23:56 IdeaPad-L340 kernel: RDX: 0000000000000000 RSI:
00007fb0bfcf9e2d RDI: 0000000000000010
mar 30 10:23:56 IdeaPad-L340 kernel: RBP: 0000000000020000 R08:
0000000000000000 R09: 00005565f815089d
mar 30 10:23:56 IdeaPad-L340 kernel: R10: 0000000000000010 R11:
0000000000000246 R12: 00007fb0bfcf9e2d
mar 30 10:23:56 IdeaPad-L340 kernel: R13: 0000000000000000 R14:
00005565f93bcd50 R15: 00005565f93cea70
mar 30 10:23:56 IdeaPad-L340 kernel: ---[ end trace 5056a774b515d800 ]---
mar 30 10:23:56 IdeaPad-L340 kernel: Error: Driver 'rtl8821ce' is already
registered, aborting...
** Tags added: hwe-bluetooth
** Also affects: rtl8821ce (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- [rtl8821ce] [10ec:c821] Bluetooth not working
+ RTL8821CE 802.11ac PCIe [10ec:c821] Bluetooth not working
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https://bugs.launchpad.net/bugs/1921829
Title:
RTL8821CE 802.11ac PCIe [10ec:c821] Bluetooth not working
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