Kernel almost hangs when CONFIG_DRM_RADEON=y

Michel Dänzer michel at
Sat Aug 27 02:00:38 PDT 2011

On Sam, 2011-08-27 at 00:20 -0400, Pavel Ivanov wrote: 
> I observe very strange behavior dependent on value of
> CONFIG_DRM_RADEON parameter. When it's set to m everything works very
> good, no problem. When I set it to y I see kernel hang during boot. Or
> I should better say it "almost hangs" because during last boot attempt
> I accidentally waited a little bit longer and saw that after more than
> a minute waiting system continued to boot. Dmesg after "hang" shows
> these messages:
> [    8.542639] [drm] Loading CEDAR Microcode
> [   69.161605] r600_cp: Failed to load firmware "radeon/CEDAR_pfp.bin"
> [   69.161670] [drm:evergreen_startup] *ERROR* Failed to load firmware!
> While during normal boot
> [    9.898870] [drm] Loading CEDAR Microcode
> [    9.908425] radeon 0000:05:00.0: WB enabled

With CONFIG_DRM_RADEON=y, the microcode is needed before it can be
loaded from userspace, so it needs to be built into the kernel as well.

Earthling Michel Dänzer           |         
Libre software enthusiast         |          Debian, X and DRI developer

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