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    SubjectRe: Linux 2.6.37-rc8 (no fb)
    Le 29/12/10 21:16, Jesse Barnes a écrit :
    > On Wed, 29 Dec 2010 11:40:04 -0800
    > Linus Torvalds <torvalds@linux-foundation.org> wrote:
    >
    >> On Wed, Dec 29, 2010 at 10:21 AM, Randy Dunlap <randy.dunlap@oracle.com> wrote:
    >>>
    >>> The only significant difference that I can see in the kernel message log
    >>> is this:
    >>
    >> Hmm. I suspect that difference should have gone away with commit
    >> 92971021c6328 (Revert "drm: Don't try and disable an encoder that was
    >> never enabled"), but clearly that didn't fix your blank screen.
    >>
    >> Does reverting commit 448f53a1ede54eb854d036abf54573281412d650
    >> ("drm/i915/bios: Reverse order of 100/120 Mhz SSC clocks") fix it for
    >> you? It does for some people..
    >>
    >> Chris - why did that lvds_ssc_freq thing suddenly start mattering? Can
    >> we please just disable spread-spectrum entirely? Or perhaps only if we
    >> notice that it was enabled already? Or something?
    >
    > Randy, Jeff and Alex, does the below help at all? If so, it may be the
    > minimal fix we want for 2.6.37.
    >
    > diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios
    > index 2b20786..d27d016 100644
    > --- a/drivers/gpu/drm/i915/intel_bios.c
    > +++ b/drivers/gpu/drm/i915/intel_bios.c
    > @@ -263,6 +263,9 @@ parse_general_features(struct drm_i915_private *dev_priv,
    > dev_priv->int_tv_support = general->int_tv_support;
    > dev_priv->int_crt_support = general->int_crt_support;
    > dev_priv->lvds_use_ssc = general->enable_ssc;
    > + /* force disable until we can parse this correctly */
    > + if (IS_GEN5(dev) || IS_GEN6(dev))
    > + dev_priv->lvds_use_ssc = 0;
    >
    > if (dev_priv->lvds_use_ssc) {
    > if (IS_I85X(dev))
    >
    >
    I also encountered the black screen problem after commit 448f53a1. I can
    confirm that the above patch solves the problem.

    François Valenduc
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