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I upgraded my laptop (Sony VAIO SVS1511C5E, Intel Core i7-3612QM, NVIDIA
GK107M / GeForce GT 640M LE, original hard disk changed to a Crucial
SSD) yesterday from Ubuntu 17.10. to Ubuntu 18.04. The upgrade process
went smoothly without issues.
After upgrade, I cannot boot the new kernel version 4.15.0-23 in normal
mode. The boot process hangs immediately after displaying "Loading
initial ramdisk". In case I choose "Recovery mode", the system does boot
successfully with the same kernel. I also tried installing kernels
4.15.0-22 and 4.15.0-24, which both behave identically.
The problem seems to be related to the linux-modules-extra package. If
the package is not installed, the system boots also in the normal mode.
However, the display is not correctly recognized, it shows up as
"Unknown display" with 1024x768 resolution. That also happens if I
choose "Recovery mode" and "Resume boot".
The previous kernel 4.13.0-46 (with linux-modules-extra installed) works
without problems and the display is recognized correctly.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Kernel 4.15.0 fails to boot with linux-modules-extra
https://bugs.launchpad.net/bugs/1780806
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