My system does not boot anymore (blank screen, no response, no journal entries after restart) with kernel 3.14.6. I did a bisect on the linux-stable tree (3.14.y branch). The last non-working commit was: commit 4740d5c1c89c152ef847e4a479a87a25e763b286 Author: Alex Deucher <alexdeucher@gmail.com> Date: Fri Apr 11 11:21:50 2014 -0400 drm/radeon: add support for newer mc ucode on CI (v2) commit 277babc374f6ecab6af182554f5d9f35a7768755 upstream. Fixes mclk stability on certain asics. v2: print out mc firmware version used and size bug: https://bugs.freedesktop.org/show_bug.cgi?id=75992 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Chipset info from Xorg: RADEON(0): Chipset: "VERDE" (ChipID = 0x683d)
This commit requires new microcode in the driver. You are probably seeing the firmware loader waiting for a long time for the new microcode to become available. Grab the latest radeon microcode from the linux-firmware tree.
Thanks for the hint! The new kernel firmware fixes the problem.