Mediatek WLAN RZ616(MT7922) SAR table control
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
AaronMa | ||
linux (Ubuntu) |
In Progress
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Low
|
Unassigned | ||
Kinetic |
Fix Released
|
Medium
|
Unassigned | ||
linux-firmware (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Undecided
|
Unassigned | ||
Kinetic |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem-5.17 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Undecided
|
Unassigned | ||
Kinetic |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
In order to make sure the amount of RF energy being absorbed by our bodies is safe according to the FCC’s guidelines, products must undergo and pass SAR testing.
[Fix]
Add ACPI SAR table control to pass the testing.
[Test]
the unit is 0.5dBm in following:
Without the SAR table control:
$ sudo cat /sys/kernel/
CCK (user) : N.A N.A N.A N.A
OFDM (user) : 40 40 40 40 40 40 40 40
HT20 (user) : 40 40 40 40 40 40 40 40
HT40 (user) : 40 40 40 40 40 40 40 40 40
VHT20 (user) : 40 40 40 40 40 40 40 40 40 40 0 0
VHT40 (user) : 40 40 40 40 40 40 40 40 40 40 0 0
VHT80 (user) : 40 40 40 40 40 40 40 40 40 40 0 0
VHT160 (user) : 40 40 40 40 40 40 40 40 40 40 0 0
HE26 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE52 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE106 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE242 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE484 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE996 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
HE996x2 (user) : 40 40 40 40 40 40 40 40 40 40 40 40
After enabled SAR table control:
$ sudo cat /sys/kernel/
CCK (user) : N.A N.A N.A N.A
OFDM (user) : 26 26 26 26 26 26 26 26
HT20 (user) : 26 26 26 26 26 26 26 26
HT40 (user) : 26 26 26 26 26 26 26 26 26
VHT20 (user) : 26 26 26 26 26 26 26 26 26 26 0 0
VHT40 (user) : 26 26 26 26 26 26 26 26 26 26 0 0
VHT80 (user) : 26 26 26 26 26 26 26 26 26 26 0 0
VHT160 (user) : 26 26 26 26 26 26 26 26 26 26 0 0
HE26 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE52 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE106 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE242 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE484 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE996 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
HE996x2 (user) : 26 26 26 26 26 26 26 26 26 26 26 26
Also done stress test with iperf, all works fine.
[Where problems could occur]
It may break mt7922 driver.
These commits are already in oem-6.0 and unstable.
CVE References
tags: | added: oem-priority originate-from-1975584 sutton |
summary: |
- Mediatek WLAN RZ616(aka MT7922) SAR table control + Mediatek WLAN RZ616(MT7922) SAR table control |
description: | updated |
description: | updated |
Changed in linux-oem-5.17 (Ubuntu Kinetic): | |
status: | New → Invalid |
Changed in linux (Ubuntu Kinetic): | |
status: | New → In Progress |
Changed in linux (Ubuntu Jammy): | |
status: | New → In Progress |
Changed in linux (Ubuntu): | |
status: | Incomplete → In Progress |
Changed in hwe-next: | |
status: | New → In Progress |
Changed in linux-oem-5.17 (Ubuntu): | |
status: | New → In Progress |
Changed in linux-oem-5.17 (Ubuntu Jammy): | |
status: | New → In Progress |
Changed in linux (Ubuntu Kinetic): | |
importance: | Undecided → Medium |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Jammy): | |
importance: | Undecided → Low |
no longer affects: | linux-firmware (Ubuntu) |
no longer affects: | linux-firmware (Ubuntu Jammy) |
no longer affects: | linux-firmware (Ubuntu Kinetic) |
Changed in linux-firmware (Ubuntu): | |
status: | New → In Progress |
Changed in linux-firmware (Ubuntu): | |
status: | In Progress → Fix Committed |
Changed in linux-oem-5.17 (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
Changed in linux-oem-5.17 (Ubuntu): | |
status: | In Progress → Invalid |
no longer affects: | linux-oem-5.17 (Ubuntu Kinetic) |
no longer affects: | linux (Ubuntu Kinetic) |
Changed in linux (Ubuntu Kinetic): | |
status: | New → Fix Committed |
importance: | Undecided → Medium |
Changed in linux-oem-5.17 (Ubuntu Kinetic): | |
status: | New → Invalid |
Changed in linux-firmware (Ubuntu Kinetic): | |
status: | New → Fix Committed |
Changed in linux-firmware (Ubuntu): | |
status: | Fix Committed → Invalid |
no longer affects: | linux (Ubuntu Jammy) |
no longer affects: | linux-oem-5.17 (Ubuntu Jammy) |
Changed in linux (Ubuntu Jammy): | |
importance: | Undecided → Low |
status: | New → In Progress |
Changed in linux-oem-5.17 (Ubuntu Jammy): | |
status: | New → Fix Committed |
Changed in linux-firmware (Ubuntu Jammy): | |
status: | New → Fix Committed |
Changed in linux (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
Changed in hwe-next: | |
assignee: | nobody → AaronMa (mapengyu) |
status: | In Progress → Fix Released |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1997200
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.