and its
inode number. A new file can be created with the same name, but it won't
be able to use the same inode number unless all references to the old file
have been released.
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you want to accomplish here? I'm
still puzzled. Are you trying to avoid letting the timer expire
repeatedly while the device is in use for a prolonged time?
Alan Stern
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Your log basically shows a hub going berserk.
Or a bad USB transceiver. _Something_ is generating those overcurrent
warnings, and it sure looks like a hardware malfunction.
Alan Stern
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existing standalone
program to do that.
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There are tools which can simulate USB devices. See
http://www.linux-usb.org/gadget/
I don't think any of the existing tools will simulate a printer, however.
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is this relevant to
usb-storage?
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memory? Too much system
overhead? Too slow to respond?
By many metrics (though not all!) C programs are more efficient than shell
scripts.
We actually did it this way
as a quick fix. I guess we stumbled onto the right solution?
The right sort of solution, anyway.
Alan Stern
-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/Documentation/ABI/testing/sysfs-bus-usb
===
--- usb-2.6.orig/Documentation/ABI/testing/sysfs-bus-usb
+++ usb-2.6/Documentation/ABI/testing/sysfs-bus-usb
@@ -13,3 +13,29 @@ Description
?
You mean, evaluate (urb urb-dev urb-dev-bus)? Yes indeed, it
might. But in the course of evaluating that inner expression, the
execution would stop as soon as it found that urb was NULL. That's
guaranteed by the C language.
Alan Stern
On Wed, 21 Mar 2007, Oliver Neukum wrote:
Am Mittwoch, 21. März 2007 16:05 schrieb Alan Stern:
It's not clear what you mean. That patch series removed some braindead
code and added a facility whereby the SCSI disk driver would spin down a
disk during suspend and spin up during resume
;
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in practice you do want from new
drivers, so I'm very interested in what you are expecting.
Thanks
dom
For that matter, how much in-tree code uses the Wireless USB declarations?
It seems to me that if one is acceptable then the other should be too.
Alan Stern
sorry. HAL? Where do I get this daemon?
It's part of the hal package, which is included in Fedora and presumably
other distributions as well. See
http://www.freedesktop.org/Software/hal
Alan Stern
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the previous error.
This patch (as873) fixes that oversight.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
CC: Jiri Kosina [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/input/hid-core.c
===
--- usb-2.6.orig/drivers/usb/input/hid-core.c
On Tue, 20 Mar 2007, Oliver Neukum wrote:
Am Montag, 19. März 2007 19:38 schrieb Alan Stern:
Judging from the bug report, it sounds like a problem with the userspace
tools -- apparently either scanimage or sane exits before the scanner is
ready. Or maybe the problem lies in the scanner
On Tue, 20 Mar 2007, Jiri Kosina wrote:
On Tue, 20 Mar 2007, Alan Stern wrote:
The USB HID driver fails to reset its error-retry timeout when there
has been a long time interval between I/O errors with no successful URB
completions in the meantime. As a result, the very next error would
USB_COMPOSITE_DEVICE
#define ADJUST_INTF(i) do {i -= fsg-interface_shift;} while (0)
#else
#define ADJUST_INTF(i) do {} while (0)
#endif
Together these two changes would remove over half of your giant patch.
Alan Stern
... is the device's name.) To resume, to:
echo -n 0 /sys/bus/usb/devices/.../power/state
To test remote wakeup, do:
echo enabled /sys/bus/usb/devices/.../power/wakeup
before suspending.
Alan Stern
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with having an
unbound device disconnect? Doesn't it reconnect when the port is resumed?
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On Mon, 19 Mar 2007, Oliver Neukum wrote:
Am Montag, 19. März 2007 17:21 schrieb Alan Stern:
On Mon, 19 Mar 2007, Oliver Neukum wrote:
Hi,
I got another bug report about a scanner disconnecting when
suspended. Could we introduce a setting for deciding whether
unbound devices
.
This fixes the NumLock-hang bug reported by Jiri Slaby.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Greg:
This needs to get into 2.6.21.
Alan Stern
Index: usb-2.6/drivers/usb/host/uhci-q.c
===
--- usb-2.6.orig/drivers/usb
-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/host/uhci-q.c
===
--- usb-2.6.orig/drivers/usb/host/uhci-q.c
+++ usb-2.6/drivers/usb/host/uhci-q.c
@@ -123,10 +123,14 @@ static struct uhci_td *uhci_alloc_td(str
, your next step is to do nothing at all. HAL does this polling for
you automatically. Just make sure you run HAL and you'll be all set.
Alan Stern
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Adel using the
same email address, but they have been answered by David Brownell.
Using gadgetfs isn't hard. Trying to explain it to someone who isn't
willing to go through the examples and figure things out for himself is
_very_ hard.
Alan Stern
.
What use is polling for activity if the devices have no way to report the
activity to the computer?
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me up. Now, if
some drivers want to take that as a hint not to suspend the device, then
okay -- but it isn't a standardized meaning.
Alan Stern
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I still see the errors when I disable ACPI in the kernel configuration.
Take a look at your BIOS settings for USB. In particular, if there's a
setting for USB Legacy device support, try turning it off.
Alan Stern
On Thu, 15 Mar 2007, Oliver Neukum wrote:
Am Donnerstag, 15. März 2007 14:31 schrieb Alan Stern:
Oliver:
Suppose the superuser has suspended a USB device and disabled autoresume.
Then what should happen under the following circumstances?
1. The device's usbfs file is opened
flag tells the driver to ignore the
Class and SubClass values in the interface descriptor.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
CC: Vojtech Pavlik [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/class/usblp.c
===
--- usb-2.6
I size this cleanly? BITS_PER_LONG?
That would work.
Alan Stern
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On Fri, 16 Mar 2007, Oliver Neukum wrote:
Am Freitag, 16. März 2007 20:46 schrieb Alan Stern:
Here's a patch to implement all this. I'm still not crazy about the idea
of disabling autoresume, but I can see that some people might want to do
it occasionally.
This patch is meant to go
to the bConfigurationValue attribute.
3. A new driver module is loaded and it is probed for one
of the device's interfaces.
As things stand now, all three would fail. Does that seem reasonable?
Alan Stern
P.S.: You've got 3 or 4 different email addresses floating around, and I'm
never quite sure
for cycles.
Comments? Should I add a warning to Documentation/URB.txt?
It wouldn't be a bad idea to do so.
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to work at the same time. I am of
course trying
that as well, but just in case i can't i'll have to live with these errors
and would like to
know if i can suppress them.
To get rid of those messages, all you need to do is turn off
CONFIG_USB_DEBUG.
Alan Stern
On Thu, 15 Mar 2007, Oliver Neukum wrote:
Am Donnerstag, 15. März 2007 14:31 schrieb Alan Stern:
Oliver:
Suppose the superuser has suspended a USB device and disabled autoresume.
Then what should happen under the following circumstances?
1. The device's usbfs file is opened
This patch (as870) adds a delay to ehci-hcd's bus_resume routine.
Apparently there are controllers and/or BIOSes out there which need
such a delay to get the ports back into their correct state. This
fixes Bugzilla #8190.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
David:
I'm a little
-ROM) and then pull the plug when the
keyboad doesn't work!
Can you get the live-CD to initialize a network interface via DHCP and
then log in remotely?
Alan Stern
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that flavor.
It depends on the chipset used for the motherboard. Intel and VIA use
UHCI, pretty much everyone else uses OHCI.
Dick, there's an even simpler way to debug this. Install your special CD
on a machine with an old-fashioned PS/2 keyboard and use that!
Alan Stern
to manage at load
time; instead the driver core calls their probe() routine later on.
Consequently drivers can't tell at load time whether there will be any
useful work for them to do.
Alan Stern
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On Wed, 14 Mar 2007, Oliver Neukum wrote:
Am Dienstag, 13. März 2007 21:37 schrieb Alan Stern:
+/**
+ * usb_external_resume_device - external resume of a USB device and its
interfaces
+ * @udev: the usb_device to resume
+ *
+ * This routine handles external resume requests: ones
runtime power management. You ought to bring it up on linux-pm.
Alan Stern
P.S.: Even if we leave autosuspend out of the picture, I imagine that
constantly suspending and resuming your system would take more power than
just letting it sit idle
On Wed, 14 Mar 2007, Gordon Messmer wrote:
Alan Stern wrote:
On Tue, 13 Mar 2007, Gordon Messmer wrote:
2.6.20 behaves the same. If I built a preemptible kernel, (with preempt
the BKL) and the timer frequency is 1000 HZ, then the mouse has issues.
If I build a kernel with a lower
On Wed, 14 Mar 2007, Gordon Messmer wrote:
Alan Stern wrote:
On Wed, 14 Mar 2007, Gordon Messmer wrote:
I have tried other mice with this PC. I have an old MS optical
Intellimouse (the second worst mouse I've ever used), and a newer
revision of the problematic Logitech BD-58, a BT
.)
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() call to after the HCD's stop() method, at
which time IRQ generation should be disabled.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/core/hcd.c
===
--- usb-2.6.orig/drivers/usb/core/hcd.c
+++ usb-2.6
machines with different
hardware, i think that without debian binary kernels can be like live in
the hell. Do you know any way to try that it would be patched in
mainstream linux kernel?
Okay, below is a patch you should test. If it works, I will submit it to
be included in the kernel.
Alan
On Tue, 13 Mar 2007, Greg KH wrote:
On Tue, Mar 13, 2007 at 11:10:52AM -0400, Alan Stern wrote:
This patch (as865) fixes a race in the HCD removal code discovered by
Milan Plzik. Arrival of an interrupt after the root hub was
unregistered could cause the root-hub status timer to start up
those two config settings causes the errors
to start, whereas changing any one of them eliminates the errors.
I must admit, I don't see how these config changes could affect the
controller's behavior so much. Maybe there's some deep problem in your
motherboard's chipset...
Alan Stern
of the change, it turns out to be necessary to do remote
wakeup of root hubs from a workqueue. We had been using khubd, but it
does autoresume rather than an external resume. Using the
ksuspend_usb_wq workqueue for this purpose seemed a logical choice.
Signed-off-by: Alan Stern [EMAIL PROTECTED
This patch (as867) adds an entry for the new power/autosuspend
attribute in Documentation/ABI/testing, and it changes the behavior of
the delay value. Now a delay of 0 means to autosuspend as soon as
possible, and negative values will prevent autosuspend.
Signed-off-by: Alan Stern [EMAIL
On Tue, 13 Mar 2007, Gordon Messmer wrote:
Alan Stern wrote:
It would help if you could try out 2.6.20, since it is the most recent
kernel. Verify that changing those two config settings causes the errors
to start, whereas changing any one of them eliminates the errors.
2.6.20
detection problem? I can test, provide whatever info needed. I
have over 40 of these devices so I'm desperate to iron out this last
issue :)
Post another usbmon log showing what happens with your unusual_devs entry
present.
Alan Stern
and run the real USBSnoopy program
on it.
Alan Stern
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, this looks like a real bug. Does it happen reproducibly on your
device? Does the patch below fix it?
Alan Stern
Index: usb-2.6/drivers/usb/core/hcd.c
===
--- usb-2.6.orig/drivers/usb/core/hcd.c
+++ usb-2.6/drivers/usb/core/hcd.c
@@ -544,6
connected to USB.
Would it be possible for you to add the atomic counter underflow check to
2.6.21-rc3 and see if the problem still occurs? If it doesn't, that's a
good indication the USB stack isn't guilty -- the bus registration code
hasn't changed for several kernel releases.
Alan Stern
On Mon, 12 Mar 2007, Jiri Slaby wrote:
Jiri Slaby napsal(a):
Alan Stern napsal(a):
On Mon, 12 Mar 2007, Jiri Slaby wrote:
After rmmoding of uhci_hcd on fresh booted 2.6.21-rc3-mm2 I got this:
BUG: atomic counter underflow at:
[...]
[c01db754] kobject_put+0x14/0x16
[c01db8a3
it. That includes ehci-hcd, ohci-hcd, uhci-hcd, and
any other USB drivers. You also have to unmount /proc/bus/usb if it is
mounted.
You can change some module parameters on-the-fly. In this case you would
have to write to /sys/module/usbcore/parameters/usbfs_snoop.
Alan Stern
increase the timeout to something like 1000 (1 second).
Alan Stern
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with -EPROTO error.
That's a normal error, indicating that the device isn't responding to
packets. Not surprising, since you have turned it off.
Alan Stern
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Mass Storage driver (look it up in
the MAINTAINERS file in the kernel source).
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But I don't expect it.
I wouldn't be surprised if an unusual_devs entry could fix the problem.
But first we would have to know what the problem is, which requires either
a verbose usb-storage debugging log or a usbmon log.
Alan Stern
to simulate an unplug (actually, to do an unbind), and
echo FOO /sys/bus/usb/drivers/usbhid/unbind
to do a bind, where FOO is the name of the USB mouse device link present
in the /sys/bus/usb/drivers/usbhid directory.
Alan Stern
: write error: No such device
Any thoughts?
Another mistake on my part. The correct command is
echo -n '2-2:1.0' /sys/bus/usb/drivers/usbhid/unbind
Without the -n, the system thinks that the newline character at the end
of the line written by echo is part of the filename.
Alan Stern
, the
answer is simple. Since it doesn't use DMA, it should access the memory
pointed to by urb-transfer_buffer (and urb-setup_packet for control
transfers).
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timeout value of 2 ms seems rather low. You might want to increase
it.
Have you tried setting the usbfs_snoop=1 module parameter for usbcore? It
will dump your program's I/O activity to the system log.
Alan Stern
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driver is behaving as intended.
Alan Stern
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On Fri, 9 Mar 2007, Oliver Neukum wrote:
Am Donnerstag, 8. März 2007 16:57 schrieb Alan Stern:
On Thu, 8 Mar 2007, Oliver Neukum wrote:
All right, maybe it wouldn't if you did it for a short time -- but then
what would be the point? Surely if you want to power down the network
that interface --
without doing ifconfig down and breaking all the existing sessions.
Isn't that what you wanted?
Alan Stern
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This patch (as864) moves the work routine for USB autosuspend from one
source file to another. This permits the removal of one whole global
symbol (!) and should smooth the way for more changes in the future.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/core
. As such it has to be per-URB, not per-device or per-endpoint.
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, the first no longer worked.
Could it be a memory-mapping error? Both sets of registers got mapped to
the same address? See what dmesg says when you modprobe ohci-hcd, and do
a detailed comparison between 2.6.21-rc3 and a working kernel.
Alan Stern
to the interface.
Why? A full suspension of the system does that and we should seek
to be able to do the same.
What happens when the opposite end of a network connection tries to send
data to a suspended system? Yes, TCP is pretty aggressive about retries,
but doesn't it eventually give up?
Alan Stern
*/
};
recompile module and install it but now i have this error on printer
reconnect:
usblp: probe of 3-1:1.0 failed with error -5
usb 3-1: device_add(3-1:1.0) -- -5
anyone on the list can help me please? i would like very pleased, thanks
in advance.
What does lsusb -v show for the printer?
Alan
On Wed, 7 Mar 2007, Pete Zaitcev wrote:
On Wed, 7 Mar 2007 17:18:29 -0500 (EST), Alan Stern [EMAIL PROTECTED] wrote:
I've never heard of a process failing to show up in a SysRq-t listing. It
suggests something is wrong with the process management in the kernel you
were using
dereference at virtual address
...
hehehe i would be better long away from kernel code i think :).
Probably. :-)
Try making the change above and see what happens.
Alan Stern
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and bInterfaceSubClass set to 255, but bInterfaceProtocol
is 2 and it seems to work with that setting.
Details are in the earlier messages of this thread. Can we just add a new
type of quirk, like USBLP_QUIRK_IGNORE_CLASS, for usblp_select_alts()?
Alan Stern
-- Forwarded message --
Date: Tue, 06 Mar 2007 22:00:39 +0100
From: Peer Griebel [EMAIL PROTECTED]
To: linux-usb-users@lists.sourceforge.net
Subject: [Linux-usb-users] EHCI reports message lost IAA
Dear USB developers,
Sam Revitch is currently developing a driver for Ricoh
is to run USBSnoopy under Wine and use it
to view binary logs. However this might not work for you.
Alan Stern
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versa). Other controllers don't use DMA, but gadget drivers should always
call alloc_buffer so that they will work correctly with all peripheral
controllers.
Alan Stern
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these suspends; it
is called fsg_suspend().
Alan Stern
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On Tue, 6 Mar 2007, Eric Buddington wrote:
On Tue, Mar 06, 2007 at 01:34:41PM -0500, Alan Stern wrote:
The stack trace didn't include the khubd process at all. Probably that
means it had already died.
No, it's still there. I ran 'echo t /proc/sysrq-trigger' again, and
khubd did
this
routine without it. You will have to add an awful lot of additional code.
Alan Stern
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. A similar approach will
work from within a program.
Alan Stern
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, or is this new behavior?
How often does the problem occur?
Alan Stern
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On Wed, 7 Mar 2007, Eric Buddington wrote:
On Wed, Mar 07, 2007 at 03:22:05PM -0500, Alan Stern wrote:
On Wed, 7 Mar 2007, Eric Buddington,,, wrote:
So SysRq-t doesn't show anything about khubd, and SysRq-p doesn't give
me anything at all. What else can I try?
How about SysRq
disk, which won't umount (device is busy).
It looks like khubd allocates memory and enters reiser4. Possibly we have
GFP_KERNEL in khubd where we should have GFP_NOIO or reiser4 has
a problem dealing with IO failures.
A more complete stack trace (for example, Alt-SysRq-T) would help.
Alan Stern
On Tue, 6 Mar 2007, Valentin Longchamp wrote:
Alan Stern wrote:
c-desc.bMaxPower is what the hub makes available for each port and
udev-bus_mA is what the device requests.
It's the reverse: (c-desc.bMaxPower * 2) is what the device requests and
udev-bus_mA is what the hub makes
.
Alan Stern
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= 8 Ivl=248ms
As you can see, the UPS binds to the usbhid driver. Not a serial driver.
I obviously have too many hubs...
Is there no chance of making a direct usb connection work to this device?
Isn't it working now?
Alan Stern
-- but the USB development mailing list
probably isn't the best place to look.
Alan Stern
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On Tue, 6 Mar 2007, Eric Buddington wrote:
On Tue, Mar 06, 2007 at 10:36:20AM -0500, Alan Stern wrote:
On Tue, 6 Mar 2007, Oliver Neukum wrote:
Am Dienstag, 6. M??rz 2007 05:13 schrieb Eric Buddington:
reiser4[khubd(163)]: commit_current_atom
(fs/reiser4/txnmgr.c:1049)[nikita
.
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controller to ignore this kind of activity. I
don't know what can be done about it.
Alan Stern
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or
transceiver (Phillips ISP1504) documentation (quick look).
Search for power_budget in the source code for your bus glue.
Alan Stern
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-hcd. Evidently
some EHCI controllers won't perform a handoff if the companion controller
isn't initialized.
Alan Stern
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. For instance,
ACPI might mess up the power supply to the Bluetooth device.
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the Linux system clock at the time
the SOF packet is sent.
Any help would be appreciated.
Section 5.12 of the USB 2.0 spec contains an extensive discussion of clock
synchronization.
Alan Stern
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On Sat, 3 Mar 2007, Oliver Neukum wrote:
Am Samstag, 3. März 2007 16:51 schrieb Alan Stern:
On Sat, 3 Mar 2007, Cristian Mammoli wrote:
Oliver Neukum ha scritto:
There's a very small chance that the compiler is to blame, but
it is far more likely that the phenomenon itself
for the unaligned access?
No, how can I get the dump if really need it?
Use dmesg after the problem occurs, or just copy the data from the console
screen (use a VT or a serial console, not X).
Alan Stern
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from working.
Trying hard is fine, but to keep on trying for over 60 seconds is foolish.
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