https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #84 from Alex Deucher <ag...@yahoo.com> ---
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.
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