*** This bug is a duplicate of bug 1528684 ***
https://bugs.launchpad.net/bugs/1528684
Mainline commit 8f8027c5f935 is now in the Bionic master-next repo:
41b696d80377 mailbox: PCC: erroneous error message when parsing ACPI PCCT
** This bug has been marked a duplicate of bug 1528684
** Tags added: verification-needed-bionic
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https://bugs.launchpad.net/bugs/1779605
Title:
[Ubuntu 18.04] Error parsing PCC subspaces from PPCT" is splashed to
screen
To manage
** Attachment added: "dmesg - test-kernel"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1779605/+attachment/5161476/+files/dmesg-test-kernel.txt
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Verified the test-kernel shared in the above link on the same setup
where the issue was seen with bionic kernels.
Uploading dmesg.
Issue seems to be fixed and change observed now is:
[0.229581] Detected 1 PCC Subspaces
[0.229581] Registering PCC driver as Mailbox controller
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You
I built a test kernel the with v4 3/3 patch. The test kernel can be downloaded
from:
http://kernel.ubuntu.com/~jsalisbury/lp1779605
Can you test this kernel and see if it resolves this bug?
Note about installing test kernels:
• If the test kernel is prior to 4.15(Bionic) you need to install
The v4 was proposed and applied:
https://patchwork.kernel.org/patch/10404957/
I feel only the 3/3 (3rd patch in whole series) is enough to deal with this bug.
If you could give me a test kernel, I shall verify it and confirm it here.
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There are three patches in the following patch set:
https://www.spinics.net/lists/linux-acpi/msg81863.html
Are all three patches needed, or just a subset?
Also, it looks like the patch set is now on v3. Since this patch set
has not landed in mainline yet, do you think there will be additional
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => In Progress
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** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
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** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => Triaged
** Changed
** Changed in: dellserver
Assignee: (unassigned) => Michael Reed (mreed8855)
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https://bugs.launchpad.net/bugs/1779605
Title:
[Ubuntu 18.04] Error parsing PCC subspaces from PPCT"
Moving back to 'Confirmed' as mentioned in c#3, since dmesg logs are already
attached.
If more logs are required, please let me know.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Attachment added: "Screenshot"
https://bugs.launchpad.net/dellserver/+bug/1779605/+attachment/5158528/+files/PCCT_error.jpg
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