Public bug reported:
**Summary:**
Frequent and random WiFi disconnects with MediaTek MT7921E on Ubuntu 25.10. No
firmware/driver errors in dmesg, but regular deauthentications and connection
drops. Issue persists across multiple networks and router configurations.
**Steps to Reproduce:**
1. Boot Ubuntu 25.10 on a laptop/PC with MediaTek MT7921E WiFi.
2. Connect to a WiFi network (tried both home router and phone hotspot).
3. Observe connection drops and deauthentications every few minutes.
**Expected Result:**
Stable WiFi connection.
**Actual Result:**
WiFi disconnects at random intervals. NetworkManager and dmesg logs show
repeated deauthentications with reason "UNSPECIFIED".
**What I've Tried:**
- Ensured `linux-firmware` is installed and firmware files are
present/uncompressed in `/lib/firmware/mediatek/`:
- `WIFI_MT7922_patch_mcu_1_1_hdr.bin`
- `WIFI_RAM_CODE_MT7922_1.bin`
- Disabled WiFi power saving with `nmcli`.
- Tested on multiple networks.
- Changed router settings: set static channel, tried 2.4GHz, 5GHz, 6GHz,
disabled WPA3, band steering, fast roaming, etc.
- System is fully updated.
- Issue persists with all combinations.
**Relevant Logs/Outputs:**
**dmesg | grep mt7921**
```
[ 15.249567] mt7921e 0000:16:00.0: enabling device (0040 -> 0042)
[ 15.324512] mt7921e 0000:16:00.0: ASIC revision: 79610010
[ 15.757554] mt7921e 0000:16:00.0: HW/SW Version: 0x8a108a10, Build Time:
20250625153620a
[ 15.772573] mt7921e 0000:16:00.0: WM Firmware Version: ____010000, Build
Time: 20250625153703
[ 17.425308] mt7921e 0000:16:00.0 wlp22s0: renamed from wlan0
```
**General dmesg after disconnect**
```
[ 357.825856] wlp22s0: deauthenticated from ... (Reason: 1=UNSPECIFIED)
```
**journalctl -u NetworkManager | tail -50**
```
<info> device (wlp22s0): supplicant interface state: completed -> disconnected
<info> device (wlp22s0): supplicant interface state: disconnected -> scanning
<info> device (wlp22s0): supplicant interface state: scanning -> authenticating
<info> device (wlp22s0): supplicant interface state: authenticating ->
associating
<info> device (wlp22s0): supplicant interface state: associating ->
4way_handshake
<info> device (wlp22s0): supplicant interface state: 4way_handshake -> completed
<info> dhcp4 (wlp22s0): state changed new lease, address=192.168.0.230, acd
pending
<info> dhcp4 (wlp22s0): state changed new lease, address=192.168.0.230
<info> policy: set 'ICE1472' (wlp22s0) as default for IPv4 routing and DNS
```
**System Information:**
```
cat /etc/os-release
NAME="Ubuntu"
VERSION="25.10 (Development Branch)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 25.10 (Development Branch)"
VERSION_ID="25.10"
...
**sudo lshw -short**
...
H/W path Device Class Description
======================================================================
system IBM xSeries High
Volume Racks x3630 M4: -[7158AC1]-
/0 bus Motherboard
/0/1 processor Intel(R) Xeon(R) CPU
E5-2450 v2 @ 2.50GHz
/0/1/3 memory 64KiB L1 cache
/0/1/4 memory 256KiB L2 cache
/0/1/5 memory 20MiB L3 cache
/0/2 processor Intel(R) Xeon(R) CPU
E5-2450 v2 @ 2.50GHz
/0/2/6 memory 64KiB L1 cache
/0/2/7 memory 256KiB L2 cache
/0/2/8 memory 20MiB L3 cache
/0/6 memory 48GiB System Memory
/0/6/0 memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/1 memory [empty]
/0/6/2 memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/3 memory [empty]
/0/6/4 memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/5 memory [empty]
/0/6/6 memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/7 memory [empty]
/0/6/8 memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/9 memory [empty]
/0/6/a memory 8GiB DIMM DDR3 1333
MHz (0.8 ns)
/0/6/b memory [empty]
/0/17 memory 128KiB BIOS
/0/19 bus 00Y7335
/0/100 bridge Xeon E7 v2/Xeon E5
v2/Core i7 DMI2
/0/100/1 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 1a
/0/100/1.1 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 1b
/0/100/1.1/0 scsi0 storage MegaRAID SAS 2208
[Thunderbolt]
/0/100/1.1/0/0.e.0 /dev/sda disk 2TB ST2000NM0023
/0/100/1.1/0/0.e.0/1 volume 1074MiB Windows FAT
volume
/0/100/1.1/0/0.e.0/2 /dev/sda2 volume 1861GiB EXT4 volume
/0/100/1.1/0/0.f.0 /dev/sdb volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.10.0 /dev/sdc volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.11.0 /dev/sdd volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.12.0 /dev/sde volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.13.0 /dev/sdf volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.14.0 /dev/sdg volume 1863GiB ST2000NM0023
/0/100/1.1/0/0.15.0 /dev/sdh volume 1863GiB ST2000NM0023
/0/100/3 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 3a
/0/100/3/0 wlp22s0 network MT7921 802.11ax PCI
Express Wireless Network Adapter
/0/100/3.2 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 3c
/0/100/3.2/0 /dev/fb0 display Cedar [Radeon HD
5000/6000/7350/8350 Series]
/0/100/3.2/0.1 card0 multimedia Cedar HDMI Audio
[Radeon HD 5400/6300/7300 Series]
/0/100/3.2/0.1/0 input11 input HDA ATI HDMI
HDMI/DP,pcm=3
/0/100/4 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 0
/0/100/4.1 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 1
/0/100/4.2 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 2
/0/100/4.3 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 3
/0/100/4.4 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 4
/0/100/4.5 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 5
/0/100/4.6 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 6
/0/100/4.7 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 7
/0/100/5 generic Xeon E7 v2/Xeon E5
v2/Core i7 VTd/Memory Map/Misc
/0/100/5.2 generic Xeon E7 v2/Xeon E5
v2/Core i7 IIO RAS
/0/100/11 bridge C600/X79 series
chipset PCI Express Virtual Root Port
/0/100/1a bus C600/X79 series
chipset USB2 Enhanced Host Controller #2
/0/100/1a/1 usb1 bus EHCI Host Controller
/0/100/1a/1/1 bus Integrated Rate
Matching Hub
/0/100/1a/1/1/3 card1 multimedia MV-SILICON fifine
Microphone
/0/100/1c bridge C600/X79 series
chipset PCI Express Root Port 1
/0/100/1c.2 bridge C600/X79 series
chipset PCI Express Root Port 3
/0/100/1c.2/0 bridge SH7757 PCIe Switch
[PS]
/0/100/1c.2/0/0 bridge SH7757 PCIe Switch
[PS]
/0/100/1c.2/0/0/0 /dev/fb0 bridge SH7757 PCIe-PCI
Bridge [PPB]
/0/100/1c.2/0/1 bridge SH7757 PCIe Switch
[PS]
/0/100/1c.4 bridge C600/X79 series
chipset PCI Express Root Port 5
/0/100/1c.4/0 eno1 network I350 Gigabit Network
Connection
/0/100/1d bus C600/X79 series
chipset USB2 Enhanced Host Controller #1
/0/100/1d/1 usb2 bus EHCI Host Controller
/0/100/1d/1/1 bus Integrated Rate
Matching Hub
/0/100/1d/1/1/1 bus Gadget USB HUB
/0/100/1d/1/1/1/5 enx42f2e91c6cb7 communication RNDIS/Ethernet Gadget
/0/100/1d/1/1/2 scsi5 storage DataTraveler 3.0
/0/100/1d/1/1/2/0.0.0 /dev/sdi disk 30GB DataTraveler 3.0
/0/100/1d/1/1/2/0.0.0/0 /dev/sdi disk 30GB
/0/100/1d/1/1/2/0.0.0/0/1 /dev/sdi1 volume 5432MiB data
partition
/0/100/1d/1/1/2/0.0.0/0/2 /dev/sdi2 volume 15EiB Windows FAT
volume
/0/100/1d/1/1/2/0.0.0/0/3 /dev/sdi3 volume 299KiB data partition
/0/100/1d/1/1/2/0.0.0/0/4 /dev/sdi4 volume 23GiB EXT4 volume
/0/100/1d/1/1/3 input2 input JBuds Ergo Mouse
/0/100/1d/1/1/4 input10 input Lite-On Technology
Corp HP USB Multimedia Keyboard Consumer Control
/0/100/1e bridge 82801 PCI Bridge
/0/100/1f bridge C600/X79 series
chipset LPC Controller
/0/100/1f/0 system PnP device PNP0b00
/0/100/1f/1 system PnP device PNP0c02
/0/100/1f/2 generic PnP device IPI0001
/0/100/1f/3 system PnP device PNP0c02
/0/100/1f/4 communication PnP device PNP0501
/0/100/1f/5 communication PnP device PNP0501
/0/100/1f/6 system PnP device PNP0c31
/0/100/1f/7 system PnP device PNP0c02
/0/100/1f.2 scsi2 storage C600/X79 series
chipset 6-Port SATA AHCI Controller
/0/100/1f.2/0.0.0 /dev/cdrom disk DEVICE 81Y3674
/0/100/1f.3 bus C600/X79 series
chipset SMBus Host Controller
/0/7 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 0
/0/8 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 0
/0/a generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 0
/0/b generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 0
/0/c generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/d generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/e generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/f generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 1
/0/10 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 0
/0/11 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 1
/0/12 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 2
/0/13 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 3
/0/14 generic Xeon E7 v2/Xeon E5
v2/Core i7 UBOX Registers
/0/15 generic Xeon E7 v2/Xeon E5
v2/Core i7 UBOX Registers
/0/16 generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/18 generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1a generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1b generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1c generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1d generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1e generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/1f generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/20 generic Xeon E7 v2/Xeon E5
v2/Core i7 Home Agent 0
/0/21 generic Xeon E7 v2/Xeon E5
v2/Core i7 Home Agent 0
/0/22 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Target Address/Thermal Registers
/0/23 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 RAS Registers
/0/24 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/25 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/26 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/27 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/28 generic Xeon E7 v2/Xeon E5
v2/Core i7 DDRIO Registers
/0/29 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 0
/0/2a generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 1
/0/2b generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 0
/0/2c generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 1
/0/2d generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 2
/0/2e generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 3
/0/2f generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 2
/0/30 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 3
/0/31 generic Intel Corporation
/0/32 generic Xeon E7 v2/Xeon E5
v2/Core i7 R2PCIe
/0/33 generic Xeon E7 v2/Xeon E5
v2/Core i7 R2PCIe
/0/34 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Registers
/0/35 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Performance Ring Monitoring
/0/36 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Performance Ring Monitoring
/0/37 generic Xeon E7 v2/Xeon E5
v2/Core i7 System Address Decoder
/0/38 generic Xeon E7 v2/Xeon E5
v2/Core i7 Broadcast Registers
/0/39 generic Xeon E7 v2/Xeon E5
v2/Core i7 Broadcast Registers
/0/0 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port in DMI2 Mode
/0/3 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 3a
/0/3.2 bridge Xeon E7 v2/Xeon E5
v2/Core i7 PCI Express Root Port 3c
/0/4 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 0
/0/4.1 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 1
/0/4.2 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 2
/0/4.3 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 3
/0/4.4 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 4
/0/4.5 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 5
/0/4.6 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 6
/0/4.7 generic Xeon E7 v2/Xeon E5
v2/Core i7 Crystal Beach DMA Channel 7
/0/5 generic Xeon E7 v2/Xeon E5
v2/Core i7 VTd/Memory Map/Misc
/0/5.2 generic Xeon E7 v2/Xeon E5
v2/Core i7 IIO RAS
/0/3a generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 0
/0/3b generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 0
/0/3c generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 0
/0/3d generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 0
/0/9 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/3e generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/3f generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link 1
/0/40 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Link Reut 1
/0/41 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 0
/0/42 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 1
/0/43 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 2
/0/44 generic Xeon E7 v2/Xeon E5
v2/Core i7 Power Control Unit 3
/0/45 generic Xeon E7 v2/Xeon E5
v2/Core i7 UBOX Registers
/0/46 generic Xeon E7 v2/Xeon E5
v2/Core i7 UBOX Registers
/0/47 generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/48 generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/49 generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4a generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4b generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4c generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4d generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4e generic Xeon E7 v2/Xeon E5
v2/Core i7 Unicast Registers
/0/4f generic Xeon E7 v2/Xeon E5
v2/Core i7 Home Agent 0
/0/50 generic Xeon E7 v2/Xeon E5
v2/Core i7 Home Agent 0
/0/51 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Target Address/Thermal Registers
/0/52 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 RAS Registers
/0/53 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/54 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/55 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/56 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 0 Channel Target Address Decoder
Registers
/0/57 generic Xeon E7 v2/Xeon E5
v2/Core i7 DDRIO Registers
/0/58 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 0
/0/59 generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 1
/0/5a generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 0
/0/5b generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 1
/0/5c generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 2
/0/5d generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 Thermal Control 3
/0/5e generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 2
/0/5f generic Xeon E7 v2/Xeon E5
v2/Core i7 Integrated Memory Controller 1 Channel 0-3 ERROR Registers 3
/0/60 generic Intel Corporation
/0/61 generic Xeon E7 v2/Xeon E5
v2/Core i7 R2PCIe
/0/62 generic Xeon E7 v2/Xeon E5
v2/Core i7 R2PCIe
/0/63 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Registers
/0/64 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Performance Ring Monitoring
/0/65 generic Xeon E7 v2/Xeon E5
v2/Core i7 QPI Ring Performance Ring Monitoring
/0/66 generic Xeon E7 v2/Xeon E5
v2/Core i7 System Address Decoder
/0/67 generic Xeon E7 v2/Xeon E5
v2/Core i7 Broadcast Registers
/0/68 generic Xeon E7 v2/Xeon E5
v2/Core i7 Broadcast Registers
/1 input0 input Power Button
...
uname -r
6.17.0-5-generic
...
**WiFi Chip:**
MediaTek MT7921E
**Firmware files present:**
```
ls -l /lib/firmware/mediatek/ | grep MT7922
```
(Output listing .bin and .zst files)
**Other details:**
- Issue occurs regardless of router brand or network settings.
- Issue occurs with both home router and mobile hotspot.
**Additional info:**
- Power saving disabled.
- No errors in firmware loading.
- Issue persists after all updates.
- Issue started with ver. 20.04 persists.
- Issue present across MT7921, MT7921c, MT7921e, MT7922 devices [note:own 4
different pcie cards all with each version issue all is the exact same behavior]
- Behavior across LTS upgrade to 25.10 and fresh install
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
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https://bugs.launchpad.net/bugs/2127759
Title:
MT7921E WiFi support on Ubuntu (including 25.10)
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