Public bug reported:
[Impact]
On machines with MediaTek MT7925 Wi-Fi (PCI ID 14c3:7925), resuming from
hibernation with the 26.10 kernel (7.3.0-9-generic) hangs the system
right after the hibernation image is restored. Only a hard power-off
helps. The 7.0 kernel from 26.04 is not affected.
Upstream regression: c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx
irq masks with per-chip definitions"), merged in v7.3-rc1. It sets
wm2_complete_mask for MT7925, which has no MCU_WA rx queue, so the reset
done during restore touches a NAPI that was never initialised.
[Fix]
Cherry-pick upstream commit c182bfe944eb ("wifi: mt76: mt7925: fix reset
panic caused by the WM2 rx irq mask") from
git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git
It has "Fixes: c4edf9e3e0e5" and applies cleanly to Ubuntu-7.3.0-9.9.
It is only in wireless-next (targeted at 7.4), so v7.3 and 7.3.y will
not have it unless it is backported.
[Test Plan]
1. On an MT7925 machine with hibernation set up, run: systemctl hibernate
2. Power on and let the image restore.
Without the fix the system hangs after the restore. With the fix it
resumes and Wi-Fi works. Tested here with an out-of-tree mt7925e built
from the Ubuntu-7.3.0-9.9 source plus c182bfe944eb.
[Where problems could occur]
The change only touches mt7925_irq_map and MT7925_INT_RX_DONE_ALL; the
MT7927/MT7928 maps are untouched. MT7925 has no MCU_WA rx ring, so the
WM2 interrupt was never handled correctly anyway. If the change were
wrong, it would show up as lost MCU events on MT7925 after module load
or a chip reset.
Hardware: Gigabyte Z890M AORUS ELITE WIFI7 ICE (BIOS F21), MT7925
subsystem 105b:e112.
---
ProblemType: Bug
ApportVersion: 2.36.0-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: tvabuser 289046 F.... wireplumber
/dev/snd/controlC0: tvabuser 289046 F.... wireplumber
/dev/snd/controlC1: tvabuser 289046 F.... wireplumber
/dev/snd/seq: tvabuser 6713 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: niri
DistroRelease: Ubuntu 26.10
InstallationDate: Installed on 2026-09-29 (13 days ago)
InstallationMedia: Ubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826)
MachineType: Gigabyte Technology Co., Ltd. Z890M AORUS ELITE WIFI7 ICE
Package: linux (not installed)
ProcEnviron:
LANG=ru_RU.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=alacritty
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: root=UUID=13288e05-5a28-4207-8ef4-699af0c74f97 ro
rootflags=subvol=@ rd.luks.uuid=89a63ba7-0a0e-4f85-aabf-819c7a4a5d92
rd.retry=600 resume=UUID=13288e05-5a28-4207-8ef4-699af0c74f97
resume_offset=3442696 quiet splash initrd=\initrd.img
ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6
Tags: stonking wayland-session
Uname: Linux 7.3.0-9-generic x86_64
UpgradeStatus: Upgraded to stonking on 2026-10-11 (1 days ago)
UserGroups: adm cdrom dip docker i2c lpadmin lxd plugdev sudo users
_MarkForUpload: True
dmi.bios.date: 06/11/2026
dmi.bios.release: 5.32
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F21
dmi.board.asset.tag: Default string
dmi.board.name: Z890M AORUS ELITE WIFI7 ICE
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
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.:bvrF21:bd06/11/2026:br5.32:svnGigabyteTechnologyCo.,Ltd.:pnZ890MAORUSELITEWIFI7ICE:pvr-CF-WCP-IDO:rvnGigabyteTechnologyCo.,Ltd.:rnZ890MAORUSELITEWIFI7ICE:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaZ890MB:
dmi.product.family: Z890 MB
dmi.product.name: Z890M AORUS ELITE WIFI7 ICE
dmi.product.sku: Default string
dmi.product.version: -CF-WCP-IDO
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-collected stonking wayland-session
** Tags added: apport-collected stonking wayland-session
** Description changed:
[Impact]
On machines with MediaTek MT7925 Wi-Fi (PCI ID 14c3:7925), resuming from
hibernation with the 26.10 kernel (7.3.0-9-generic) hangs the system
right after the hibernation image is restored. Only a hard power-off
helps. The 7.0 kernel from 26.04 is not affected.
Upstream regression: c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx
irq masks with per-chip definitions"), merged in v7.3-rc1. It sets
wm2_complete_mask for MT7925, which has no MCU_WA rx queue, so the reset
done during restore touches a NAPI that was never initialised.
[Fix]
Cherry-pick upstream commit c182bfe944eb ("wifi: mt76: mt7925: fix reset
panic caused by the WM2 rx irq mask") from
git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git
It has "Fixes: c4edf9e3e0e5" and applies cleanly to Ubuntu-7.3.0-9.9.
It is only in wireless-next (targeted at 7.4), so v7.3 and 7.3.y will
not have it unless it is backported.
[Test Plan]
1. On an MT7925 machine with hibernation set up, run: systemctl hibernate
2. Power on and let the image restore.
Without the fix the system hangs after the restore. With the fix it
resumes and Wi-Fi works. Tested here with an out-of-tree mt7925e built
from the Ubuntu-7.3.0-9.9 source plus c182bfe944eb.
[Where problems could occur]
The change only touches mt7925_irq_map and MT7925_INT_RX_DONE_ALL; the
MT7927/MT7928 maps are untouched. MT7925 has no MCU_WA rx ring, so the
WM2 interrupt was never handled correctly anyway. If the change were
wrong, it would show up as lost MCU events on MT7925 after module load
or a chip reset.
Hardware: Gigabyte Z890M AORUS ELITE WIFI7 ICE (BIOS F21), MT7925
subsystem 105b:e112.
+ ---
+ ProblemType: Bug
+ ApportVersion: 2.36.0-0ubuntu1
+ Architecture: amd64
+ AudioDevicesInUse:
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC2: tvabuser 289046 F.... wireplumber
+ /dev/snd/controlC0: tvabuser 289046 F.... wireplumber
+ /dev/snd/controlC1: tvabuser 289046 F.... wireplumber
+ /dev/snd/seq: tvabuser 6713 F.... pipewire
+ CasperMD5CheckResult: pass
+ CurrentDesktop: niri
+ DistroRelease: Ubuntu 26.10
+ InstallationDate: Installed on 2026-09-29 (13 days ago)
+ InstallationMedia: Ubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826)
+ MachineType: Gigabyte Technology Co., Ltd. Z890M AORUS ELITE WIFI7 ICE
+ Package: linux (not installed)
+ ProcEnviron:
+ LANG=ru_RU.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=alacritty
+ XDG_RUNTIME_DIR=<set>
+ ProcFB: 0 amdgpudrmfb
+ ProcKernelCmdLine: root=UUID=13288e05-5a28-4207-8ef4-699af0c74f97 ro
rootflags=subvol=@ rd.luks.uuid=89a63ba7-0a0e-4f85-aabf-819c7a4a5d92
rd.retry=600 resume=UUID=13288e05-5a28-4207-8ef4-699af0c74f97
resume_offset=3442696 quiet splash initrd=\initrd.img
+ ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6
+ Tags: stonking wayland-session
+ Uname: Linux 7.3.0-9-generic x86_64
+ UpgradeStatus: Upgraded to stonking on 2026-10-11 (1 days ago)
+ UserGroups: adm cdrom dip docker i2c lpadmin lxd plugdev sudo users
+ _MarkForUpload: True
+ dmi.bios.date: 06/11/2026
+ dmi.bios.release: 5.32
+ dmi.bios.vendor: American Megatrends International, LLC.
+ dmi.bios.version: F21
+ dmi.board.asset.tag: Default string
+ dmi.board.name: Z890M AORUS ELITE WIFI7 ICE
+ dmi.board.vendor: Gigabyte Technology Co., Ltd.
+ dmi.board.version: x.x
+ 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.:bvrF21:bd06/11/2026:br5.32:svnGigabyteTechnologyCo.,Ltd.:pnZ890MAORUSELITEWIFI7ICE:pvr-CF-WCP-IDO:rvnGigabyteTechnologyCo.,Ltd.:rnZ890MAORUSELITEWIFI7ICE:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaZ890MB:
+ dmi.product.family: Z890 MB
+ dmi.product.name: Z890M AORUS ELITE WIFI7 ICE
+ dmi.product.sku: Default string
+ dmi.product.version: -CF-WCP-IDO
+ dmi.sys.vendor: Gigabyte Technology Co., Ltd.
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2170598
Title:
mt7925e: system hangs on resume from hibernation with the 7.3 kernel
(fix: upstream c182bfe944eb)
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