Author Topic: 3 quarters of the screen black  (Read 933 times)

Offline EduardoCR

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3 quarters of the screen black
« on: May 30, 2018, 03:27:08 am »
I have an LG X11 netbook for quite some time now. At first, I had it with MS Windows, but soon enough migrated it to Linux. I chose Peppermint because it runs very well on older, weaker machines. I installed version 6 and it went pretty well, but since it is a netbook I very seldom use I stored it and left it unused for a couple of months. But then I decided to revive it only to discover that at boot up, after the bios screen, the logon and subsequent main screen were taken over by three quarters black screen with a line of jibberish pixels across the top of those 3 quarters, The right-hand quarter - the normal one - appears ok, with the icons I left there perfectly visible. Apart from the screen, everything appears to be ok.
So I set to try a different approach: I plugged a live usb with version 8 of Peppermint and it booted fine, with the entire screen visible and working well. I decided to install it over the older version and it went ok, with the first boot coming on ok. I worked with it for an hour or so and then shut it down. The next day there it was again: the 3 quarters black screen taking over at logon. Updating doesn't seem to do the trick, either. And yet, whenever I boot from a live usb, it works fine...
Can anyone help ?
« Last Edit: May 30, 2018, 05:31:04 am by EduardoCR »

Offline PCNetSpec

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Re: 3 quarters of the screen black
« Reply #1 on: May 30, 2018, 01:35:16 pm »
Okay I'm pretty sure I know what the problem is, but I need the output from a command before I can give detailed instructions for the fix.

Can you boot to the LiveUSB .. connect to the internet, so you can post the output by copy/pasting .. then post the output from running:
Code: [Select]
sudo fdisk -l
WARNING: You are logged into reality as 'root' .. logging in as 'insane' is the only safe option.

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Offline EduardoCR

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Re: 3 quarters of the screen black
« Reply #2 on: June 01, 2018, 03:03:54 am »
Hi PcNetSpec. Thanks for your kind reply.
Here's the result:

Code: [Select]
Disk /dev/sda: 149.1 GiB, 160041885696 bytes, 312581808 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x6a3bed2c

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048 310505471 310503424 148.1G 83 Linux
/dev/sda2       310507518 312580095   2072578  1012M  5 Extended
/dev/sda5       310507520 312580095   2072576  1012M 82 Linux swap / Solaris


Disk /dev/zram0: 246.8 MiB, 258777088 bytes, 63178 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/zram1: 246.8 MiB, 258777088 bytes, 63178 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
peppermint@peppermint ~ $



Thanks and all the best.
« Last Edit: June 01, 2018, 04:02:56 pm by AndyInMokum »

Offline PCNetSpec

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Re: 3 quarters of the screen black
« Reply #3 on: June 01, 2018, 02:44:22 pm »
Okay try this....

Boot to the Peppermint 8 LiveUSB, open a terminal and run these commands in sequence:
Code: [Select]
sudo mount /dev/sda1 /mnt(btw, that's a number 1 NOT a lower case L ;))

then:
Code: [Select]
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; donethen:
Code: [Select]
sudo chroot /mntthen:
Code: [Select]
nano /etc/default/grubIn nano, scroll to the bottom using down arrow key.

Add a NEW line at the bottom that reads:-
Code: [Select]
GRUB_GFXPAYLOAD_LINUX=textthen hit Ctrl+X .. then Y .. then Enter (to save and exit nano).

Back in the terminal, run:
Code: [Select]
update-grubwhen that completes, hit Ctrl+D (to exit the chroot environment).

Now reboot to the HDD to test.



Hint - It may be easier to boot the LiveUSB, connect to the internet, visit this page, then you can copy/paste the commands into the terminal ;)
WARNING: You are logged into reality as 'root' .. logging in as 'insane' is the only safe option.

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PCNetSpec

Offline EduardoCR

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Re: 3 quarters of the screen black
« Reply #4 on: June 02, 2018, 12:44:25 pm »
Hello and thanks for you prompt reply.
In fact, it appears to have solved the problem. Hopefully it will stay solved... Although I'm not a complete newbie in linux, these matters are not clear to me. I'll try to figure out what it was and what your code meant...
Thanks again for your time and patience.
All the best.

Offline PCNetSpec

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Re: 3 quarters of the screen black
« Reply #5 on: June 02, 2018, 07:55:03 pm »
WARNING: You are logged into reality as 'root' .. logging in as 'insane' is the only safe option.

Team Peppermint
PCNetSpec