[Bug 94502] R9-270 has no video output when underclocked

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94502

            Bug ID: 94502
           Summary: R9-270 has no video output when underclocked
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: maweki at gmail.com

I have a Radeon R9-270 and I am running Fedora 23 with the default OpenSource
drivers supplied with the repository.

Yesterday I did an Update from Kernel 4.3.3-300 to 4.4.3-300 and I started
seeing some issues. When I do nothing for about 12 seconds the screens (dual
head) turn blank. Moving the mouse makes the screen go back on again. Sometimes
the login-screen of the gnome-shell or chrome are frozen but the system as a
whole seems fine.

During normal operations /sys/kernel/debug/dri/0/radeon_pm_info is the
following:
power level 0    sclk: 30000 mclk: 120000 vddc: 950 vddci: 1000 pcie gen: 2

When the screen is still for a bit (exactly when it turns blank) the output is
power level 0    sclk: 30000 mclk: 15000 vddc: 900 vddci: 850 pcie gen: 2

So apparently, when the video card is clocked down, the output is deactivated.

My current "workaround" is running videos on the side - not an ideal solution.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20160311/141ba871/attachment.html>