Just wondering. I am still using rtl8821ce-dkms on Ubuntu 20.04. This is
not needed anymore now and 5 Ghz Wifi DFS protetcted channels are now
available?

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https://bugs.launchpad.net/bugs/1885862

Title:
  Add in-tree Realtek 8821CE wireless module support

Status in HWE Next:
  New
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/20210202055012.8296-1-pks...@realtek.com/
  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/20200603094218.19942-1-yhchu...@realtek.com/ . 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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