[Bug 57281] New: Radeon: Bad performance and power consumption
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Mon Apr 29 05:34:00 PDT 2013
https://bugzilla.kernel.org/show_bug.cgi?id=57281
Summary: Radeon: Bad performance and power consumption
Product: Drivers
Version: 2.5
Kernel Version: 3.8.2-pf
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
ReportedBy: ka.nick at mail.ru
Regression: No
Created an attachment (id=100261)
--> (https://bugzilla.kernel.org/attachment.cgi?id=100261)
lspci -vv output
After upgrading my AMD E-450-based notebook to a newer one (HP 4545s
A4-3300-based) i noticed that in spite of noticeable higher clock rate the
video performance is about 15-20% worse than on E-450. It also got much hotter
initially, which I could cure by passing pcie_aspm=force to the kernel. In
spite of this I still have a feeling that it probably eats more power than it
should (which I can not prove with numbers, of course) comparing to E-450 (and
fglrx) experience. (Yes, I know the proprietary driver performs better in terms
of power management, too, but the question is to what extent?) Anyways, it
shouldn't underperform the older and weaker model...
It also shows the message at boot time:
[drm:radeon_acpi_init] *ERROR* Cannot find backlight controller
but it seems to work fine after that. (Shall I post another bug on this?)
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