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[Launchpad Bug Tracker <1513500@xxxxxxxxxxxxxxxxxx>]

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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
-- 
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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