Public bug reported:
The Bluetooth half of the MediaTek MT7925 (RZ717) Wi-Fi 7 combo card
never comes up. On the first boot after install, the btusb/btmtk
firmware download times out. After that the USB device stops responding
at enumeration (descriptor read -110 / setup address -71), so btusb
never binds and no hci0 exists. A warm reboot and a full cold boot (PSU
switched off, about 3 minutes without power) do not recover it. Wi-Fi on
the same card (mt7925e) works normally.
Hardware
- Motherboard: ASRock X870 Riptide WiFi, BIOS 4.20 (2026-04-16)
- CPU: AMD Ryzen 9 9900X
- Card: MEDIATEK MT7925 (RZ717) Wi-Fi 7 160MHz [14c3:0717] at 08:00.0, driver
mt7925e (working)
- Bluetooth: USB 0e8d:0717 "MediaTek Inc. Wireless_Device", on chipset xHCI
port 8-12 (AMD 800 Series USB 3.x xHCI [1022:43fc], driver xhci-pci-prom21)
Software
- Ubuntu 26.10 (fresh install 2026-10-20)
- Kernel: 7.3.0-9-generic (Ubuntu 7.3.0-9.9-generic 7.3.0-rc6)
- linux-firmware: 20260915.git1522c78a.1ubuntu (BT_RAM_CODE_MT7925_1_1_hdr.bin
present)
- Secure Boot enabled
Boot 1 (first boot after install): device enumerates, firmware download fails
[ 5.005083] usb 8-12: New USB device found, idVendor=0e8d, idProduct=0717,
bcdDevice= 1.00
[ 5.026239] usb 8-12: Product: Wireless_Device
[ 5.026320] usb 8-12: Manufacturer: MediaTek Inc.
[ 6.915014] usbcore: registered new interface driver btusb
[ 6.927009] Bluetooth: hci0: HW/SW Version: 0x00000000, Build Time:
20260813113236
[ 19.027082] Bluetooth: hci0: Execution of wmt command timed out
[ 19.027127] Bluetooth: hci0: Failed to send wmt patch dwnld (-110)
[ 19.027143] Bluetooth: hci0: Failed to set up firmware (-110)
[ 21.588007] usb 8-12: Failed to suspend device, error -110
[ 26.706692] Bluetooth: hci0: Failed to read uhw reg(-110)
... usb 8-12: reset high-speed USB device ... device descriptor
read/64, error -110 (repeats)
... usb 8-12: device not accepting address N, error -71
Boot 2 (warm reboot) and Boot 3 (cold boot, PSU off ~3 min): device never
enumerates
[ 5.564055] usb 8-12: new high-speed USB device number 7 using
xhci-pci-prom21
[ 11.007358] usb 8-12: device descriptor read/64, error -110
[ 26.879237] usb 8-12: device descriptor read/64, error -110
... usb 8-12: Device not responding to setup address.
... usb 8-12: device not accepting address 10, error -71
(no btusb/btmtk load, /sys/class/bluetooth absent, bluetoothctl: "No default
controller available")
Side effect: on boot 2, mt7925e Wi-Fi probe only happened about 70 s
after boot, 1 s after the kernel gave up on usb 8-12.
Expected
Bluetooth firmware loads and hci0 is available, as on other MT7925 systems.
Already checked
- No modprobe blacklist for bluetooth/btusb/btmtk; modules exist for the
running kernel.
- rfkill: no soft/hard block.
- Cold boot does not recover the device.
- No other kernel available in the archive to compare (only 7.3.0-9).
Possibly related
- LP: #2145164 (MT7925 Bluetooth not detected on USB bus, linux-oem-6.17)
- Red Hat Bugzilla #2372880
- kernel.org bugzilla 220986 and 220237 (MediaTek MT7925 Bluetooth)
- linux-usb RFC, Aug 2026: "USB/Bluetooth: recover MT7925 ..." (recovery for
the post-WMT-timeout state, reports that power-off is not a reliable workaround)
ProblemType: Bug
DistroRelease: Ubuntu 26.10
Package: linux-image-7.3.0-9-generic 7.3.0-9.9
ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6
Uname: Linux 7.3.0-9-generic x86_64
ApportVersion: 2.36.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 20 13:16:35 2026
InstallationDate: Installed on 2026-10-20 (0 days ago)
InstallationMedia: Ubuntu 26.10 "Stonking Stingray" - Official amd64 (20261013)
IwDevWlp8s0Link: Not connected.
MachineType: ASRock X870 Riptide WiFi
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.3.0-9-generic
root=UUID=177866f5-361c-4b53-bbed-3821c0d1e406 ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/16/2026
dmi.bios.release: 5.41
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 4.20
dmi.board.asset.tag: Default string
dmi.board.name: X870 Riptide WiFi
dmi.board.vendor: ASRock
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr4.20:bd04/16/2026:br5.41:svnASRock:pnX870RiptideWiFi:pvrDefaultstring:rvnASRock:rnX870RiptideWiFi:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaDefaultstring:
dmi.product.family: Default string
dmi.product.name: X870 Riptide WiFi
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: ASRock
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug stonking wayland-session
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https://bugs.launchpad.net/bugs/2171475
Title:
MT7925 Bluetooth (0e8d:0717): WMT firmware download times out (-110),
then device stops enumerating on USB, persists across cold boot
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