fix-qwen2vl-no-position_ids (huggingface#33487)

Author: simonJJJ

src/transformers/models/qwen2_vl/modeling_qwen2_vl.py

@@ -1719,6 +1719,9 @@ def forward(
             if attention_mask is not None:
                 attention_mask = attention_mask.to(inputs_embeds.device)
 
+        if position_ids is None and input_ids is not None:
+            position_ids, _ = self.get_rope_index(input_ids, image_grid_thw, video_grid_thw, attention_mask)
+
         outputs = self.model(
             input_ids=None,
             position_ids=position_ids,