Ask 8821C Bluetooth controller to drop old firmware
Bug #1904221 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Groovy |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem-5.6 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Groovy |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Some platforms may keep USB power in S3/S4/S5, so Realtek 8821C retains
its firmware even with a cold boot.
[Fix]
Use vendor command to drop firmware if the version is old.
[Test case]
Use dmesg to check if new firmware is loaded.
With the patch applied, we can find new firmware is loaded.
[Where problems could occur]
There's a 200ms delay which can slow down when BT controller is opened
by userspace first time.
CVE References
Changed in linux-oem-5.6 (Ubuntu Groovy): | |
status: | New → Invalid |
Changed in linux-oem-5.6 (Ubuntu): | |
status: | New → Invalid |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Changed in linux (Ubuntu Focal): | |
status: | New → Confirmed |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | New → Confirmed |
Changed in linux (Ubuntu Groovy): | |
status: | New → Confirmed |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Focal): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Groovy): | |
importance: | Undecided → Medium |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu Groovy): | |
status: | Confirmed → Fix Committed |
tags: |
added: verification-done-focal removed: verification-needed-focal |
tags: |
added: verification-done-groovy removed: verification-needed-groovy |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
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This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- focal' to 'verification- done-focal' . If the problem still exists, change the tag 'verification- needed- focal' to 'verification- failed- focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!