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I version-upgraded Ubuntu 15.04 in place to Ubuntu 15.10 on an HP workstation
with a Intel Core i7 and 16GB RAM. The HDD was previously in a different
computer, and I have seen issues with the settings from the old machine
fighting with the settings for current OS version. The behaviour is as follows:
When I log in with the 4.2.x kernel, the machine changes to a blank screen
pauses for a moment and returns me to the login splash screen.
I can log in normally if I use the 3.19.0-32-generic kernel.
I can also change to TTY1 and log in at the command line with the 4.2.x kernel.
description: Computer
width: 64 bits
capabilities: smbios-2.5 vsyscall32
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 15GiB
*-cpu
product: Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
vendor: Intel Corp.
physical id: 1
bus info: cpu@0
size: 2133MHz
capacity: 3068MHz
width: 64 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8
apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good
nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2
ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi
flexpriority ept vpid cpufreq
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: 4.2.x gui kernel login wily
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In Ubuntu 15.10, the vmlinuz-4.2.0-17-generic will not take password on splash
screen
https://bugs.launchpad.net/bugs/1513500
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