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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915.ko corrupt text lines at top, [drm] GPU HANG: ecode 2:0:0x037fffc1, reason: Ring hung"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96473#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - i915.ko corrupt text lines at top, [drm] GPU HANG: ecode 2:0:0x037fffc1, reason: Ring hung"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96473">bug 96473</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Something to try just to check that the VGA disable is taking effect as soon as
we expect:
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 801e4c17dd8d..2b9410ad91e4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15425,6 +15425,9 @@ static void i915_disable_vga(struct drm_device *dev)
I915_WRITE(vga_reg, VGA_DISP_DISABLE);
POSTING_READ(vga_reg);
+
+ I915_WRITE(vga_reg, VGA_DISP_DISABLE);
+ POSTING_READ(vga_reg);
}
void intel_modeset_init_hw(struct drm_device *dev)
@@ -16204,6 +16207,8 @@ void intel_modeset_gem_init(struct drm_device *dev)
}
intel_backlight_register(dev);
+
+ i915_redisable_vga(dev);
}
void intel_connector_unregister(struct intel_connector *intel_connector)</pre>
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