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From: Jiri Kosina <>
To: Pete Zaitcev <>
Subject: Re: Boot time Bluetooth BUG: warning: (value > m) at hid-core.c:793
Date: Thu, 22 Feb 2007 09:04:47 +0100 (CET)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, 21 Feb 2007, Pete Zaitcev wrote:

> Can I get something useful without a kernel recompile, with something 
> like evtest? I have users on Fedora hitting this too. It very likely is 
> a regression caused by the new unified HID.

Hi Pete,

I don't think that this is caused by the newly introduced generic HID 
layer - I can see that both the bugreports in RH bugzilla are reported 
against 2.6.19-1.2895.fc6. I have downloaded the source RPM and discovered 
that these kernels are based on vanilla - these kernels didn't 
have generic HID layer yet, so this can't be the case.

The thing is that hid2hci sends through hiddev some excessivelly large 
value, and HID subsystem then complains about it. It could be that the 
device has a broken report descriptor (*), which results in buggy behavior 
of sw.

It would be really nice to get the report descriptor - Vincent, it wasn't 
in your output. There is a following code in drivers/usb/input/hid-core.c

        printk(KERN_DEBUG __FILE__ ": report descriptor (size %u, read %d) = ", rsize, n);
        for (n = 0; n < rsize; n++)
                printk(" %02x", (unsigned char) rdesc[n]);

Could you make sure that you really compiled this file with 

	#define DEBUG_DATA

so that you get this output upon connection of new USB HID device?

(*) Which looks quite probable to me - I have been playing yesterday with 
another masterpiece from Logitech (S510 keyboard), which also requires 
fixing its report descriptor on-the-fly because it is fully usable :(

Jiri Kosina

  reply	other threads:[~2007-02-22  8:06 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-20  2:11 Fwd: " Veronique & Vincent
2007-02-20  8:02 ` Jiri Kosina
2007-02-22  2:50   ` Pete Zaitcev
2007-02-22  8:04     ` Jiri Kosina [this message]
2007-02-22 10:38     ` Veronique & Vincent
2007-02-22 10:46       ` Jiri Kosina
  -- strict thread matches above, loose matches on Subject: below --
2007-03-05 19:19 Amedee Van Gasse
2007-03-05 21:54 ` Jiri Kosina
     [not found]   ` <1173191358.9292.4.camel@saruman>
2007-03-06 14:44     ` Jiri Kosina
2007-03-23  9:15 ` Jiri Kosina
2007-02-16 12:03 [KJ][PATCH] is_power_of_2 in ia64mm Vignesh Babu BM
2007-02-16 15:02 ` [KJ] [PATCH] " Richard Knutsson
2007-02-16 15:27   ` Boot time Bluetooth BUG: warning: (value > m) at hid-core.c:793 Fortier,Vincent [Montreal]
2007-02-18 21:23     ` Jiri Kosina
2007-02-19  0:25       ` Marcel Holtmann
2007-02-19  9:36         ` Jiri Kosina
2007-02-27 15:54         ` Jiri Kosina
2007-02-27 16:12           ` Fortier,Vincent [Montreal]
     [not found]             ` <>
2007-02-27 20:35               ` Fortier,Vincent [Montreal]

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