Quoting Hans de Goede (2021-02-09 11:46:46) > Hi, > > On 2/9/21 12:27 AM, Chris Wilson wrote: > > Quoting Hans de Goede (2021-02-08 20:38:58) > >> Hi All, > >> > >> We (Fedora) have been receiving reports from multiple users about gfx issues / glitches > >> stating with 5.10.9. All reporters are users of Ivy Bridge / Haswell iGPUs and all > >> reporters report that adding i915.mitigations=off to the cmdline fixes things, see: > > > > I tried to reproduce this on the w/e on hsw-gt1, to no avail; and piglit > > did not report any differences with and without mitigations. I have yet > > to test other platforms. So I don't yet have an alternative. > > Note the original / first reporter of: > > https://bugzilla.redhat.com/show_bug.cgi?id=1925346 > > Is using hsw-gt2, so it seems that the problem is not just the enabling of > the mitigations on ivy-bridge / bay-trail but that there actually is > a regression on devices where the WA worked fine before... > > If you have access to a hsw-gt2 device then testing there might help? The current one is headless, I'm trying to get a laptop with gt2 setup again so that I can do more than test with piglit. > Also note that this reproduces more easily on 5.10.10, which does not have: > > 520d05a77b2866eb ("drm/i915/gt: Clear CACHE_MODE prior to clearing residuals") > > Not sure if that helps though. It gives a clue that it's still a problem with the pipe state. (Which is believable as there can't be much else!) -Chris
