Hi,

Do you prefer being called Kal-Heng?

On 9 November 2017 at 06:28, Kai-Heng Feng <kai.heng.f...@canonical.com>
wrote:

> Please try this kernel,
> http://people.canonical.com/~khfeng/lp1724639-1/
>
> 13 more kernels to test.
>

SUMMARY
=========
I have tried the above kernel and the graphics bug does _not_ happen.
Looking forward to testing another kernel.

I am not familiar with Linux kernels and command line package handling
(dpkg) but I can get by with 1) helpful suggestions and 2) looking at
man/info pages.

Also: I am very keen to help you track down this bug.

DETAILS
=======
These files were downloaded on my computer (turing):-

ian@turing:~/isos/khfeng/2017-11-09$ ls -lhrt
total 57M
-rw-rw-r-- 1 ian ian 936K Nov  9 11:12
linux-firmware-image-4.12.0_4.12.0-3_i386.deb
-rw-rw-r-- 1 ian ian  11M Nov  9 11:12
linux-headers-4.12.0_4.12.0-3_i386.deb
-rw-rw-r-- 1 ian ian  46M Nov  9 11:12 linux-image-4.12.0_4.12.0-3_i386.deb

Installed kernel on my Samsung NC10 Netbook (hawking) by copying the 3 debs
you provided and typing:-
dpkg -i *.deb

Modified my copy of /etc/default/grub to comment out this variable:-
#GRUB_GFXPAYLOAD_LINUX=text

Did: sudo update-grub

FIRST TEST
==========
Rebooted. Went into the GRUB sub-menu, "Advanced options for Ubuntu" .
Selected kernel 4.12.0 from the list.
It booted with no graphics problems at all.
Did uname -a. Got Linux hawking 4.12.0 # 3 SMP Thu 9 05:53:31 UTC 2017 i686
i686 i686 GNU/Linux

SECOND TEST
============
Rebooted. Went for kernel 4.14.0-04140045-generic
The graphics problem reoccurred.

THIRD TEST
==========
Did the first test again. No change - no graphics problem.


HTH,


Ian

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https://bugs.launchpad.net/bugs/1724639

Title:
  Bug in Kernel 4.13 : Intel Mobile Graphics 945 shows 80 % black screen

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