fix for PLMS live previews in txt2img

modules/sd_samplers.py

@@ -87,7 +87,7 @@ ldm.models.diffusion.plms.tqdm = lambda *args, desc=None, **kwargs: extended_tdq
 class VanillaStableDiffusionSampler:
     def __init__(self, constructor, sd_model):
         self.sampler = constructor(sd_model)
-        self.orig_p_sample_ddim = self.sampler.p_sample_ddim if hasattr(self.sampler, 'p_sample_ddim') else None
+        self.orig_p_sample_ddim = self.sampler.p_sample_ddim if hasattr(self.sampler, 'p_sample_ddim') else self.sampler.p_sample_plms
         self.mask = None
         self.nmask = None
         self.init_latent = None
@@ -113,7 +113,9 @@ class VanillaStableDiffusionSampler:
         return samples
 
     def sample(self, p, x, conditioning, unconditional_conditioning):
-        self.sampler.p_sample_ddim = lambda x_dec, cond, ts, *args, **kwargs: p_sample_ddim_hook(self, x_dec, cond, ts, *args, **kwargs)
+        for fieldname in ['p_sample_ddim', 'p_sample_plms']:
+            if hasattr(self.sampler, fieldname):
+                setattr(self.sampler, fieldname, lambda x_dec, cond, ts, *args, **kwargs: p_sample_ddim_hook(self, x_dec, cond, ts, *args, **kwargs))
         self.mask = None
         self.nmask = None
         self.init_latent = None