*** This bug is a duplicate of bug 1720219 ***
    https://bugs.launchpad.net/bugs/1720219

** This bug has been marked a duplicate of bug 1720219
   Repeated keys stop after a few characters (^@ character spam every second)

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https://bugs.launchpad.net/bugs/1753614

Title:
  ^@ characters appearing on login terminal on 17.10 and 16.04 HWE

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Artful:
  Confirmed

Bug description:
  After installing either 17.10 or 16.04 HWE to a minimal/command line
  environment, the login terminal displays a repeating string of ^@
  characters at a rate of approximately one per second. These are
  treated as actual input and prevent login as I am unable to type a
  username or password uninterrupted. Without an SSH server, the machine
  would be unusable. This does not happen under 16.04 using the standard
  non-HWE kernel.

  Hardware is a General Dynamics GD8200 laptop. BIOS has been reset and
  updated to latest version.

  lspci:
  00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family 
DRAM Controller (rev 09)
  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core 
Processor Family Integrated Graphics Controller (rev 09)
  00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series 
Chipset Family MEI Controller #1 (rev 04)
  00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network 
Connection (rev 05)
  00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family 
USB Enhanced Host Controller #2 (rev 05)
  00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family 
High Definition Audio Controller (rev 05)
  00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI 
Express Root Port 1 (rev b5)
  00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI 
Express Root Port 2 (rev b5)
  00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI 
Express Root Port 3 (rev b5)
  00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI 
Express Root Port 5 (rev b5)
  00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI 
Express Root Port 6 (rev b5)
  00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family 
USB Enhanced Host Controller #1 (rev 05)
  00:1f.0 ISA bridge: Intel Corporation QM67 Express Chipset Family LPC 
Controller (rev 05)
  00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset 
Family 6 port SATA AHCI Controller (rev 05)
  00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus 
Controller (rev 05)
  01:00.0 CardBus bridge: Ricoh Co Ltd CardBus bridge (rev 02)
  03:00.0 Ethernet controller: LSI Corporation ET-131x PCI-E Ethernet 
Controller (rev 03)
  04:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host 
Controller
  05:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)

  lsusb:
  Bus 002 Device 005: ID 0eef:0001 D-WAV Scientific Co., Ltd eGalax TouchScreen
  Bus 002 Device 004: ID 8087:07dc Intel Corp. 
  Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 001 Device 005: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader  
  Bus 001 Device 004: ID 0424:2504 Standard Microsystems Corp. USB 2.0 Hub
  Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

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