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[Bug 826248] New: Radeon memory clock is set incorrectly with profile based PM
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Fri, 21 Jun 2013 19:19:51 +0000
  • Message-id: <bug-826248-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=826248

https://bugzilla.novell.com/show_bug.cgi?id=826248#c0


Summary: Radeon memory clock is set incorrectly with profile
based PM
Classification: openSUSE
Product: openSUSE Factory
Version: 13.1 Milestone 2
Platform: x86-64
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: hrvoje.senjan@xxxxxxxxx
QAContact: qa-bugs@xxxxxxx
Found By: ---
Blocker: ---


User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/29.0.1541.0 Safari/537.36 SUSE/29.0.1541.0

Reporting this also here (don't know what is our kernel bug policy cause this
is a pure upstream bug, but maybe some suse kernel wizard will know better ;-),
https://bugzilla.kernel.org/show_bug.cgi?id=37112.
Problem occurs "only" with low/mid profiles as memory frequency is wrongly set.
E.g. with my mobility 3650 (RV635), lowest memory frequency should go to 396000
kHz, but with mentioned methods it goes as low as 296000, therefore, too low.
What is strange/interesting is that memory is set correctly with dynpm, but
that method doesn't set the engine clock low enough for a usable laptop in
summer :-)

Reproducible: Always

Steps to Reproduce:
1. echo low > /sys/class/drm/card0/device/power_profile

Actual Results:
GPU hang

Expected Results:
Cool laptop

Let me know if i can provide further info.

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