I would not accept this answer. I have 20 dead pixels on my monitor, but my monitor is 60 inch big and not right in front of my face, so I do not notice them. Only if I am looking for them. However, the Steam Deck is right in front of your face, and you WILL notice every dead pixel. Just send it back and buy another one, the normal 512 GB version with a panel from Samsung.

Yeah, I wasted a whole day on fixing this shit, but in the end it did not matter, since I could not fix it. I just went back to Windows 11 on my SD. You can say what you want about Windows, but at least it works.

The update destroyed my whole operating system, so I would not take any chances. Tried to fix it a whole day, but nothing worked. Hopefully, you are not as unlucky as me.

3.5.5 broke my whole system. I had to re-image the whole operating system.

In my case, the “performance boost” was so remarkable that it destroyed the whole system. Like being stuck at 87% for hours, and then deciding to commit suicide on the next restart. Yep, 3.5.5 is the worst update ever. All my data is gone. It completely destroyed the system, so not even the SteamOS backup entries worked for me.

Same, nothing works anymore. I downloading the image again to reflash everything. I only wanted to update my firmware, and now this…

I will be selling my SD LCD, when I get my hands on the SD OLED. Did not have a chance yesterday. Now my account is now temporarily locked, because I tried to buy the SD OLED too many times. Whose fault is it really that I could not buy one?!