(In reply to Takashi Iwai from comment #14) > OK, then the regression was introduced by them. > > FWIW, the reverted commits are: > b30edfd8d0b4b22f9c17c208064b39a3d93e6971 > drm/i915: Switch to LTTPR non-transparent mode link training > 88ebe1f572e284ecfe088648e0ae93803a75a459 > drm/i915/dp: Fix LTTPR vswing/pre-emp setting in non-transparent mode > > Could you open the upstream gitlab Issues and mention those two commits? There are few reports opened * https://gitlab.freedesktop.org/drm/intel/-/issues/3166 * https://gitlab.freedesktop.org/drm/intel/-/issues/3173 * https://gitlab.freedesktop.org/drm/intel/-/issues/2737 I'll add my report to 3166.