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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - r600: linux 3.11RC isn't booting with radeon.dpm=1 option in grub"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66963#c84">Comment # 84</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - r600: linux 3.11RC isn't booting with radeon.dpm=1 option in grub"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66963">bug 66963</a>
from <span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
<pre>Does disabling clockgating avoid the hangs?
diff --git a/drivers/gpu/drm/radeon/rv6xx_dpm.c
b/drivers/gpu/drm/radeon/rv6xx_dpm.c
index bdd888b..85f2ab8 100644
--- a/drivers/gpu/drm/radeon/rv6xx_dpm.c
+++ b/drivers/gpu/drm/radeon/rv6xx_dpm.c
@@ -1985,7 +1985,7 @@ int rv6xx_dpm_init(struct radeon_device *rdev)
pi->voltage_control =
radeon_atom_is_voltage_gpio(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
0);
- pi->gfx_clock_gating = true;
+ pi->gfx_clock_gating = false;
pi->sclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
ASIC_INTERNAL_ENGINE_SS,
0);
Make sure you do a cold shutdown after changing that.</pre>
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