** Tags added: kernel-daily-bug
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https://bugs.launchpad.net/bugs/1885862
Title:
Add in-tree Realtek 8821CE wireless module support
Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-firmware package in Ubuntu:
Invalid
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Focal:
In Progress
Status in linux-firmware source package in Focal:
Fix Released
Status in linux-oem-5.10 source package in Focal:
Fix Released
Status in linux-oem-5.6 source package in Focal:
Won't Fix
Status in linux source package in Groovy:
Won't Fix
Status in linux-firmware source package in Groovy:
Invalid
Status in linux-oem-5.10 source package in Groovy:
Invalid
Status in linux-oem-5.6 source package in Groovy:
Invalid
Bug description:
[SRU Justification]
[Impact]
RTL8821CE RFE Type 2 PCIE module is not supported by new rtw88 driver
in kernel version v5.11 or older. Dmesg gives:
rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003)
rtw_8821ce 0000:01:00.0: Firmware version 24.8.0, H2C version 12
rtw_8821ce 0000:01:00.0: rfe 2 isn't supported
rtw_8821ce 0000:01:00.0: failed to setup chip efuse info
rtw_8821ce 0000:01:00.0: failed to setup chip information
Such modules are previosly covered by rtl8821ce-dkms.
[Fix]
Patch set
https://lore.kernel.org/linux-wireless/[email protected]/
landed in v5.12-rc1, as well as WLAN firmware updates in commit
c5e3240eff0f ("rtw88: RTL8821C: Update firmware to v24.8"), which is
already available in Hirsute version 1.195. Bluetooth firmware should
have been the latest 0x829a_7644 in both Focal/Hirsute.
[Test Case]
With patched kernel, wlan interface should be up and running:
rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003)
rtw_8821ce 0000:01:00.0: Firmware version 24.8.0, H2C version 12
rtw_8821ce 0000:01:00.0 wlp1s0: renamed from wlan0
[Where problems could occur]
Previously this hardware piece can only be driven by external DKMS
modules, so with this driver patched, users can now use in-tree driver,
but may experience the difference between them in power consumption or
feature supportness.
[Other Info]
While Bionic/Focal LTS is still using rtl8821ce-dkms for RFE Type 2
cards, there is no plan to introduce such change to them. So they'll be
upgraded only at the next point release with kernel >= 5.11.
========== original bug description ==========
8821ce is being upstreamed in https://lore.kernel.org/linux-
wireless/[email protected]/ . To backport it
to ubuntu kernel so that we may obsolete the usage of rtl8821ce-dkms
from https://bugs.launchpad.net/ubuntu/+source/rtl8821ce .
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