Slow window movement and refresh after suspend/resume

[Jan Kokemüller]

Hi,

> Looking at my Xorg log, this is all I can really see out of the ordinary
> during the suspend/resume process:

I have the same issue (i915kms, Intel g45). I have worked around it
with a really ugly hack that simply retries sending the batch buffer
while X resumes.
Place the following into
/usr/ports/x11-drivers/xf86-video-intel/files/patch-src__uxa__intel_batchbuffer.c
and rebuild xf86-video-intel.


--- ./src/uxa/intel_batchbuffer.c.orig    2013-07-28 15:53:23.000000000 +0200
+++ ./src/uxa/intel_batchbuffer.c    2013-09-10 12:47:45.563838120 +0200
@@ -219,6 +219,8 @@
     intel_batch_do_flush(scrn);
 }

+#include <unistd.h>
+
 void intel_batch_submit(ScrnInfoPtr scrn)
 {
     intel_screen_private *intel = intel_get_screen_private(scrn);
@@ -251,13 +253,21 @@
     }

     ret = dri_bo_subdata(intel->batch_bo, 0, intel->batch_used*4,
intel->batch_ptr);
+    int tries = 200;
     if (ret == 0) {
+    retry:
         ret = drm_intel_bo_mrb_exec(intel->batch_bo,
                 intel->batch_used*4,
                 NULL, 0, 0xffffffff,
                 (HAS_BLT(intel) ?
                  intel->current_batch:
                  I915_EXEC_DEFAULT));
+        if (ret && tries) {
+            xf86DrvMsg(scrn->scrnIndex, X_WARNING, "retrying
batchbuffer submit\n");
+            --tries;
+            usleep(50 * 1000);
+            goto retry;
+        }
     }

     if (ret != 0) {