[Bug 94825] LVDS blank screen on GM45

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94825

--- Comment #1 from Rob Kramer <rob at solution-space.com> ---
Created attachment 122711
  --> https://bugs.freedesktop.org/attachment.cgi?id=122711&action=edit
Boot log #2, VBT disabled

Boot log #2 is with logging changed to drm.debug=0x1e log_buf_len=1M as per
Intel bug report page. Here, the VBT selection in intel-lvds.c is commented
out: 

        DRM_DEBUG_KMS("NOT using mode from VBT: ");

        /* Failed to get EDID, what about VBT? */
        /*
        if (dev_priv->vbt.lfp_lvds_vbt_mode) {
                DRM_DEBUG_KMS("using mode from VBT: ");
                drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);

                fixed_mode = drm_mode_duplicate(dev,
dev_priv->vbt.lfp_lvds_vbt_mode);
                if (fixed_mode) {
                        fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
                        goto out;
                }
        }
        */

The result is that the screen seems to work properly, including X. There are
several errors in the log though.

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