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I have Raspberry 2 B, installed the Raspbian image . Everything was good. However, when I ran 

sudo apt-get upgrade

it took about 50minues, and after reboot, i have blank screen with blinking horizontal cursor. I can SSH and work commands, but no GUI.

Can anyone tell me why this is happening, how to avoid it, and possibly shed some information on this matter?

mgPePe
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    I don't see how anyone can know what happened. You are in the best position to troubleshoot and find the root cause. – joan Jan 25 '16 at 20:17
  • But i have no knowledge of how i could do that :( – mgPePe Jan 25 '16 at 20:18
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    As joan mentioned this question is too broad. You should back up ANY computer system before doing a major change. The GUI on the Pi seems to be VERY sensitive to errors - either configuration or in the widgets. You could do an apt-get update and apt-get upgrade again (which should be much faster). – Milliways Jan 26 '16 at 00:22
  • Can you tell me how to narrow it down? I can quote exact items and version I have. – mgPePe Jan 26 '16 at 14:20

2 Answers2

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If none of those other options work, and you don't have any important files, you could always reformat the sd card and download a new version of raspian on it. However, I would only do this as a last resort if nothing else is working. You could also try and back up whatever you have left before you do this.

John Quincy
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  • Yes, unfortunately i was forced to do that. But anytime i run sudo apt-get upgrade i end up in the darkness... – mgPePe Jan 26 '16 at 14:19
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I just figured it out. I was trying to do sudo apt-get upgrade over WiFi dongle. However, the WiFi dongle didn't have good connection and things were dropping and apparently files were missing or were badly downloaded and as a result the os broke every time.

Also, my card was 16 GB, but the image was for 4 GB, so I had to expand the partition to take all the space (I saw somewhere errors for space too)

I connected it through Ethernet, ran again and everything was good.

techraf
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mgPePe
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