[Bug 1537917] Re: grub does not respond to keyboard if usb drive is not present

[themusicgod1]

another thumb drive and grub does *not* freeze/refuse input from keyboard:


Bus 003 Device 003: ID 058f:6387 Alcor Micro Corp. Flash Drive

Disk /dev/sdb: 4009 MB, 4009754624 bytes
23 heads, 22 sectors/track, 15477 cylinders, total 7831552 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x27f17f1a

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            1176     7831551     3915188    b  W95 FAT32

here's fdisk from the first one:

Command (m for help): p

Disk /dev/sdb: 4009 MB, 4009754624 bytes
255 heads, 63 sectors/track, 487 cylinders, total 7831552 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x7d391238

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           0     2216969     1108485   17  Hidden HPFS/NTFS


(ie so thumb drives ranging around  ~7831552 sectors using multiple filesystem types so far works fine, but just a usb hub or an arduino does not.)

example of hub that does not (ie that it does freeze).

Bus 003 Device 002: ID 0451:1446 Texas Instruments, Inc. TUSB2040/2070
Hub

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https://bugs.launchpad.net/bugs/1537917

Title:
  grub does not respond to keyboard if usb drive is not present

Status in grub2 package in Ubuntu:
  New

Bug description:
  Weirdest thing.  If I boot without a usb drive (drive in question:
  TAILS 2.0 beta https://tails.boum.org/news/test_2.0-rc1/index.en.html
  ), grub does not respond to keyboard input.  If I boot with said USB
  drive, it works just fine.

  lsusb entry for usb drive:
  Bus 001 Device 006: ID 8644:8003  

  grub-pc:
    Installed: 2.02~beta2-9ubuntu1.7
    Candidate: 2.02~beta2-9ubuntu1.7

  will try other USB drives as I get access to them.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: grub-pc 2.02~beta2-9ubuntu1.7
  ProcVersionSignature: Ubuntu 3.13.0-76.120-generic 3.13.11-ckt30
  Uname: Linux 3.13.0-76-generic i686
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: i386
  Date: Mon Jan 25 15:50:18 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-01-16 (8 days ago)
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
  SourcePackage: grub2
  UpgradeStatus: Upgraded to trusty on 2016-01-19 (5 days ago)

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