As a side note, I have been having a different issue right from the beginning, which is quite serious for me. I initially assumed it is linked with the hibernation issue, but now that that has been resolved this still continues: my micro SD card randomly
ejects itself. If I am working on a document saved on the SD card, it means the document can get corrupted and I could loose it forever. Sometimes days go by and there is no issue. Other times it happens several times within as short a period as half an hour.
The SD card I am using is a new high quality high speed Kingston micro SD card. I am curious to know if anyone else has experienced this with their device, and if anyone has any advice. I will open a new thread for this question, however, since many surface
Pro users have been following this thread, I thought it would be useful to add it here too.
Best of luck for anyone who is still experiencing the hibernation issue.
I have experienced the same issue for years on my Surface Pro, the first edition, my micro-SD card going on and off randomly, just like you described. The card is SanDisk 128GB, and there was a SanDisk 64GB first, with the same problems.
The only reason I didn't care much was that I only kept movie and music files on it, pointing the card as iTunes storage, so the files were easy to re-download in case anything went wrong. The only things that went wrong so far were movies sometimes refusing
to play until I removed/re-inserted the card. But because mine is a different version of the Surface, the issue is probably related to the system and not the hardware. Please create a thread dedicated to this question and post a link in here.