** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2020743
Title:
FM350(mtk_t7xx) failed to suspend, or early wake while suspending
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Won't Fix
Status in linux-oem-6.1 source package in Jammy:
Fix Committed
Status in linux source package in Kinetic:
In Progress
Status in linux-oem-6.1 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
In Progress
Status in linux-oem-6.1 source package in Lunar:
Invalid
Status in linux source package in Mantic:
In Progress
Status in linux-oem-6.1 source package in Mantic:
Invalid
Bug description:
[Impact]
FM350(mtk_t7xx) can't suspend sometimes.
kernel: [ 12.917396] mtk_t7xx 0000:57:00.0: [PM] Exiting suspend, modem in
invalid state
kernel: [ 12.917406] mtk_t7xx 0000:57:00.0: PM: pci_pm_suspend():
t7xx_pci_pm_suspend+0x0/0x20 [mtk_t7xx] returns -14
kernel: [ 12.917446] mtk_t7xx 0000:57:00.0: PM: dpm_run_callback():
pci_pm_suspend+0x0/0x1b0 returns -14
kernel: [ 12.917462] mtk_t7xx 0000:57:00.0: PM: failed to suspend async:
error -14
[Fix]
The commit in v6.4-rc3 waits for the device to be ready before suspending.
ab87603b2511 net: wwan: t7xx: Ensure init is completed before system sleep
[Test]
Verified on the machine with FM350 wwan module.
[Where problems could occur]
If the wwan is not ready before the time is up, it results in -ETIMEDOUT.
However, in this scenario, we will encounter the same issue where the system
fails to enter suspend mode. Therefore, it will not introduce regressions or
new issues.
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