bugGNU GRUB - Bugs: bug #37470, Wacom Intuos4 prevents GRUB from...


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bug #37470: Wacom Intuos4 prevents GRUB from responding to USB keyboard

Submitted by:  Sean Santos <quantheory>
Submitted on:  Sun Sep 30 03:08:04 2012  
Category: User InterfaceSeverity: Major
Priority: 5 - NormalItem Group: Hardware-specific
Status: NonePrivacy: Public
Assigned to: NoneOriginator Name: 
Open/Closed: OpenRelease: 
Release: otherReproducibility: Intermittent
Planned Release: 2.03+

(Jump to the original submission Jump to the original submission)

Wed Jan 30 03:38:13 2013, comment #7:

The Windows 8 one does not seem to have this problem. In the OP I mentioned that there was no problem with Windows (then 7) or the old GRUB. I only have this problem in GRUB2.

Sean Santos <quantheory>
Tue Jan 29 06:46:57 2013, comment #6:

Contrary to what I have thought you don't use GRUB own drivers but BIOS ones and it looks like BIOS issue. Does it happen in e.g. Windows bootloader as well?

Vladimir Serbinenko <phcoder>
Project Administrator
Mon Jan 28 15:54:41 2013, comment #5:

Can you paste your grub.cfg?

Vladimir Serbinenko <phcoder>
Project Administrator
Mon Jan 28 15:47:50 2013, comment #4:

The two keyboards (actually a keyboard and number pad) are definitely not the problem. Unplugging the keypad generally does not help. Unplugging the Wacom device has a 100% success rate. In fact, it's the only device that has any effect on this problem.

Sean Santos <quantheory>
Mon Jan 28 08:35:08 2013, comment #3:

The actual problem seems to be with "Cypress Semiconductor Corp" keypad. Wacom should be ignored altogether since it's protocol = mouse. So the problem seems to be handling 2 simultaneous keyboards but I don't have 2 of them here right now to test.

Vladimir Serbinenko <phcoder>
Project Administrator
Sun Sep 30 16:29:33 2012, comment #2:

Done. There's one message printed to stderr, which you can see at line 126.

"incomplete hub descriptor, 7 bytes"

Sean Santos <quantheory>
Sun Sep 30 10:07:28 2012, comment #1:

Can you post the output of lsusb -vv?

Vladimir Serbinenko <phcoder>
Project Administrator
Sun Sep 30 03:08:04 2012, original submission:

I got a new computer last April, and I found that GRUB usually (more than 90% of the time) does not respond to my USB keyboard in any way. I tried a few things to fix this, including:

- Switching between USB 2.0 and USB 3.0 ports
- Changing BIOS options (particularly toggling USB legacy support)
- Unplugging USB hubs

I eventually found that the problem was my Wacom tablet. With it plugged in, the keyboard almost never works in GRUB, but with it removed, the problem has never occurred.

The keyboard works in the BIOS, in Linux (I've run Ubuntu and Gentoo on this box so far) and in Windows, and in the Grub Legacy and Windows bootloaders, regardless of whether the Wacom tablet is present.

This leads me to believe that this is an issue specific to GRUB 2 and the tablet. I figured that I should report it, but I don't know what else I could do/mention that would be helpful.


Version: GRUB 2 rc1 (problem existed on previous GRUB 2 betas, including Ubuntu)
Motherboard: eVGA Z68 FTW (Intel Z68 chipset)
Operating systems: Gentoo (kernels from 3.3-3.5)
Windows 7
(previously, Ubuntu Precise)
Tablet: Wacom Intuos4
Keyboard: Kinesis Freestyle
(but problem affects other keyboards)

Sean Santos <quantheory>


Attached Files
file #27340:  grub.cfg added by quantheory (7kB - application/octet-stream - grub.cfg)
file #26670:  lsusb_output.log added by quantheory (62kB - text/x-log - My lsusb log)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -unavailable- added by phcoder (Posted a comment)
  • -unavailable- added by quantheory (Submitted the item)

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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed Mar 2 13:49:16 2016phcoderPlanned ReleaseNone=>2.03+
    Wed Mar 2 13:49:15 2016phcoderItem GroupSoftware Error=>Hardware-specific
    Tue Jan 29 01:57:46 2013quantheoryAttached File-=>Added grub.cfg, #27340
    Sun Sep 30 16:24:42 2012quantheoryAttached File-=>Added lsusb_output.log, #26670

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