On Fri, Mar 21, 2014 at 12:26:51PM +0100, Peter Senna Tschudin wrote: > On Thu, Mar 20, 2014 at 10:17 PM, Daniel Vetter <daniel@xxxxxxxx> wrote: > > On Thu, Mar 20, 2014 at 05:56:20PM +0100, Peter Senna Tschudin wrote: > >> When Fedora updated the Kernel package from 3.12 to 3.13 my notebook > >> stopped booting (Kernel freezes) when a 2560 x 1440 high res monitor > >> is attached. I have tried using 3.13.6 from kernel.org and the problem > >> persists. The problem can be partially solved by passing nomodeset to > >> Kernel which will make the Kernel to boot, but the screens never comes > >> to life. When using 3.14-rc7 it boots again, the screen works, but > >> with some oops messages. > >> > >> How can I help fixing this issue? > >> > >> I've reported te bug at: > >> https://bugzilla.redhat.com/show_bug.cgi?id=1072557 > > > > For the oops message (well it's just a WARNING, a real oops would kill > > your driver for real) please file a bug report on bugs.freedesktop.org > > against dri -> drm (intel). > > > > The information we need is the full dmesg fore the entire boot when > > enabling drm.debug=0xe on the kernel cmdline. > It is attached. > > > > > For the boot hang you've reported on the redhat bz if you want to move it > > forward I suggest to do a reverse bisect betwen 3.13 and 3.14-rc7 to > > figure out which bug _fixed_ your problem and then tell me that. I'll > > submit it for backporting to stable kernels. Google should find you some > > nice howtos for reverse bisecting kerneels. > Thank you. I'll do that. It's an issue with our fastboot clock readout code. Please apply the below patch and add an updated dmesg (again with drm.debug=0xe) to your bug report. -Daniel diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7be5984431bb..3c0f8f095a6b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -450,6 +450,8 @@ static void i9xx_clock(int refclk, intel_clock_t *clock) { clock->m = i9xx_dpll_compute_m(clock); clock->p = clock->p1 * clock->p2; + printk("p1 = %u, p2 = %u, n = %u\n", clock->p1, clock->p2, + clock->n); if (WARN_ON(clock->n + 2 == 0 || clock->p == 0)) return; clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2); -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
