Hello, On Tue, Jan 31, 2017 at 10:03:26AM +0100, Maarten Lankhorst wrote: > Op 31-01-17 om 09:09 schreef Uwe Kleine-König: > > From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > > > As the introduced comment admits this is clearly a workaround, but for > > me this is the only known way to make my Lenovo X201 work without > > flickering and crashing. > > > > Signed-off-by: Uwe Kleine-König <uwe@xxxxxxxxxxxxxxxxx> > > [uwe: added changelog, comment and restrict to GEN5] > > --- > > Hello, > > > > as I don't like having to compile my own kernel (which has this workaround) I > > suggest to apply this patch until someone with more knowledge than me about > > i915 finds the muse and time to work on this. > > Just curious, does this help? > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index ae2c0bb4b2e8..13de4c526ca6 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -1838,7 +1838,7 @@ static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state *cstate, > * this is necessary to avoid flickering. > */ > int cpp = 4; > - int width = pstate->base.visible ? pstate->base.crtc_w : 64; > + int width = 256; > > if (!cstate->base.active) > return 0; > On a kernel with this patch applied I cannot reproduce the flickering. I keep that kernel running but expect that it also fixes the crash. Best regards Uwe
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