Messages in this thread | | | Subject | Re: Mobility Radeon HD 4530/4570/545v: flicker in 1920x1080 | From | Michel Dänzer <> | Date | Fri, 6 Nov 2015 11:25:09 +0900 |
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On 06.11.2015 05:23, Pavel Machek wrote: > Hi! > >>>> The flickering would vanish completely if that's the reason for the issue >>>> you are seeing. >>> >>>> Try setting ref_div_min and ref_div_max to 2 in >>>> radeon_compute_pll_avivo(). >>> >>> Ok, I did this, but no luck, still flickers. But the flicker only >>> happens when something changes on screen, like dragging a big >>> window. Is that consistent with wrong PLL timings? >> >> Does it go away with radeon.dpm=0? Sounds more like either memory >> reclocking happening outside of vblank, or underflow to the display >> controllers. > > No, it does not: > > pavel@half:~$ cat /proc/cmdline > BOOT_IMAGE=(hd0,2)/l/linux/arch/x86/boot/bzImage root=/dev/sda4 > resume=/dev/sda1 radeon.dpm=0 > > ..and same issue. And yes, it looks like an underflow to me. How can I > debug reclocking / underflows?
Does radeon.disp_priority=2 help?
-- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
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