riscv: revert SiFive Unleashed CPUFreq
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-riscv (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Groovy |
Fix Released
|
Medium
|
Unassigned |
Bug Description
== SRU Justifcation Groovy/RISCV ==
The SiFive Unleashed board with the current Ubuntu cpufreq default config can hang on boot with CPU freq enabled with the latest device tree settings. It is known that the cpufreq can be problematic so the recommended way forward is to currently revert the cpufreq enablement commit
commit 3949df6ecdca043
Author: David Abdurachmanov <email address hidden>
Date: Tue Jan 28 02:55:56 2020 -0800
SiFive Unleashed CPUFreq
== The fix(es) ==
Revert commit "SiFive Unleashed CPUFreq"
== Test Case ==
Boot with the latest DT. It should now boot. Boot without the latest DT, it should also boot.
== Where problems could occur ==
1. Users expecting CPU freq scaling now don't have this working option. This is deemed to be acceptable as without the fix their systems are likely to be unbootable with the updated DT.
CVE References
Changed in linux (Ubuntu Groovy): | |
importance: | Undecided → Medium |
status: | New → Triaged |
affects: | linux (Ubuntu) → linux-riscv (Ubuntu) |
Changed in linux-riscv (Ubuntu Groovy): | |
status: | Triaged → Fix Committed |
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 1917433
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.