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black screen before login screen

Cannot login via Unity login screen after upgrade to 12.04Booting Into Black ScreenInstallation of Ubuntu: Gets straight to login screen and turns black after login

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

2

I'm using Ubuntu 14.04 LTS on my laptop. I installed the drivers for my graphics card from AMD Support (first download). Then I restarted my laptop. Now I have a black screen before the graphical login screen with the user selection. GRUB works fine; I can see its advanced options. This screen happens after the disc has been decrypted.

What's happening? How can I fix it?

boot login-screen

share|improve this question

edited Dec 5 '15 at 19:49

JdeBP

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asked Dec 5 '15 at 0:22

Karol Karol

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• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The latest version of LTS or are you using 15? Also is it just a blank black screen or is it the gub black screen > can you login un to grub in black screen Ctl Alt F1? Please update your answer thx
  
  – DnrDevil
  Dec 5 '15 at 1:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I use 14.04 LTS. I see grub also I can use advence options. So my grub works fine. Problem appears after decryption disk. I see empty black sreen instead of login site with selection users.
  
  – Karol
  Dec 5 '15 at 9:31
  

  
  
  
  

add a comment
 | 

2

I'm using Ubuntu 14.04 LTS on my laptop. I installed the drivers for my graphics card from AMD Support (first download). Then I restarted my laptop. Now I have a black screen before the graphical login screen with the user selection. GRUB works fine; I can see its advanced options. This screen happens after the disc has been decrypted.

What's happening? How can I fix it?

boot login-screen

share|improve this question

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

1111 silver badge22 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The latest version of LTS or are you using 15? Also is it just a blank black screen or is it the gub black screen > can you login un to grub in black screen Ctl Alt F1? Please update your answer thx
  
  – DnrDevil
  Dec 5 '15 at 1:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I use 14.04 LTS. I see grub also I can use advence options. So my grub works fine. Problem appears after decryption disk. I see empty black sreen instead of login site with selection users.
  
  – Karol
  Dec 5 '15 at 9:31
  

  
  
  
  

add a comment
 | 

I'm using Ubuntu 14.04 LTS on my laptop. I installed the drivers for my graphics card from AMD Support (first download). Then I restarted my laptop. Now I have a black screen before the graphical login screen with the user selection. GRUB works fine; I can see its advanced options. This screen happens after the disc has been decrypted.

What's happening? How can I fix it?

boot login-screen

share|improve this question

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

1111 silver badge22 bronze badges

share|improve this question

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

1111 silver badge22 bronze badges

share|improve this question

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

1111 silver badge22 bronze badges

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

edited Dec 5 '15 at 19:49

JdeBP

3,3441414 silver badges3131 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

1111 silver badge22 bronze badges

asked Dec 5 '15 at 0:22

Karol Karol

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2 Answers
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0

This sounds alot like a problem I had recently, as detailed at https://unix.stackexchange.com/questions/241577/grub-menu-not-visible .

The short version is:

1. 
   sudoedit /etc/default/grub, find the line that says #GRUB_GFXMODE=640x480 and uncomment it (delete the #), and save your changes.


2. 
   sudo update-grub (This step is important. I missed it the first couple times and accomplished absolutely nothing.)


3. Reboot.

If that works, you will see the grub menu on your next startup. Assuming it does work, follow the linked instructions to determine the screen resolutions your system supports and step up through them until things stop working, then back up one step.

Hope that helps.

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  My grub works fine.
  
  – Karol
  Dec 5 '15 at 9:31
  

  
  
  
  

add a comment
 | 

0

I also encountered the problem, guessing should be compatibility issue. You can check the log in the following paths like /var/log/syslog,var/log/lightdm/lightdm.log.

It seems hard to correct the problem by changing the set of NVIDIA's drive or GUI modules considering that i have tried my such programs by googling.

My solution is: Change your Monitor cable. Don't use HDMI cable but DVI cable. If you had tried this solution but failed, you should maybe read the logs mentioned above and try to understand and fix it manually.

share|improve this answer

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

add a comment
 | 

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0

This sounds alot like a problem I had recently, as detailed at https://unix.stackexchange.com/questions/241577/grub-menu-not-visible .

The short version is:

1. 
   sudoedit /etc/default/grub, find the line that says #GRUB_GFXMODE=640x480 and uncomment it (delete the #), and save your changes.


2. 
   sudo update-grub (This step is important. I missed it the first couple times and accomplished absolutely nothing.)


3. Reboot.

If that works, you will see the grub menu on your next startup. Assuming it does work, follow the linked instructions to determine the screen resolutions your system supports and step up through them until things stop working, then back up one step.

Hope that helps.

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  My grub works fine.
  
  – Karol
  Dec 5 '15 at 9:31
  

  
  
  
  

add a comment
 | 

0

This sounds alot like a problem I had recently, as detailed at https://unix.stackexchange.com/questions/241577/grub-menu-not-visible .

The short version is:

1. 
   sudoedit /etc/default/grub, find the line that says #GRUB_GFXMODE=640x480 and uncomment it (delete the #), and save your changes.


2. 
   sudo update-grub (This step is important. I missed it the first couple times and accomplished absolutely nothing.)


3. Reboot.

If that works, you will see the grub menu on your next startup. Assuming it does work, follow the linked instructions to determine the screen resolutions your system supports and step up through them until things stop working, then back up one step.

Hope that helps.

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  My grub works fine.
  
  – Karol
  Dec 5 '15 at 9:31
  

  
  
  
  

add a comment
 | 

This sounds alot like a problem I had recently, as detailed at https://unix.stackexchange.com/questions/241577/grub-menu-not-visible .

The short version is:

1. 
   sudoedit /etc/default/grub, find the line that says #GRUB_GFXMODE=640x480 and uncomment it (delete the #), and save your changes.


2. 
   sudo update-grub (This step is important. I missed it the first couple times and accomplished absolutely nothing.)


3. Reboot.

If that works, you will see the grub menu on your next startup. Assuming it does work, follow the linked instructions to determine the screen resolutions your system supports and step up through them until things stop working, then back up one step.

Hope that helps.

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

edited Apr 13 '17 at 12:37

Community♦

1

edited Apr 13 '17 at 12:37

Community♦

1

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

answered Dec 5 '15 at 5:18

Darwin von CoraxDarwin von Corax

11511 gold badge11 silver badge88 bronze badges

0

I also encountered the problem, guessing should be compatibility issue. You can check the log in the following paths like /var/log/syslog,var/log/lightdm/lightdm.log.

It seems hard to correct the problem by changing the set of NVIDIA's drive or GUI modules considering that i have tried my such programs by googling.

My solution is: Change your Monitor cable. Don't use HDMI cable but DVI cable. If you had tried this solution but failed, you should maybe read the logs mentioned above and try to understand and fix it manually.

share|improve this answer

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

add a comment
 | 

0

I also encountered the problem, guessing should be compatibility issue. You can check the log in the following paths like /var/log/syslog,var/log/lightdm/lightdm.log.

It seems hard to correct the problem by changing the set of NVIDIA's drive or GUI modules considering that i have tried my such programs by googling.

My solution is: Change your Monitor cable. Don't use HDMI cable but DVI cable. If you had tried this solution but failed, you should maybe read the logs mentioned above and try to understand and fix it manually.

share|improve this answer

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

add a comment
 | 

I also encountered the problem, guessing should be compatibility issue. You can check the log in the following paths like /var/log/syslog,var/log/lightdm/lightdm.log.

It seems hard to correct the problem by changing the set of NVIDIA's drive or GUI modules considering that i have tried my such programs by googling.

My solution is: Change your Monitor cable. Don't use HDMI cable but DVI cable. If you had tried this solution but failed, you should maybe read the logs mentioned above and try to understand and fix it manually.

share|improve this answer

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

share|improve this answer

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

edited May 12 at 4:00

Kevin Bowen

15.9k1515 gold badges6262 silver badges7373 bronze badges

answered May 12 at 2:41

poorguypoorguy

111 bronze badge

answered May 12 at 2:41

poorguypoorguy

111 bronze badge