External numpad and possible debouncing issue

I'm using an external numpad for laptops that don't have one built-in. The device uses independent numlock design, which means if the host numlock state is different from its own, it would quickly toggle numlock on and off as you type. When using this thing under Linux desktop, there appears to some strong debouncing behavior and quick double taps get recognized as one.
Below is the xev sequence if I double tap Num_7 quickly. It's basically NumLock - KP_7 - NumLock, so only one KP_7 stroke gets registered.
MappingNotify event, serial 37, synthetic NO, window 0x0,
request MappingKeyboard, first_keycode 8, count 248
KeyPress event, serial 37, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170122, (-526,30), root:(757,358),
state 0x0, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170129, (-526,30), root:(757,358),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170137, (-526,30), root:(757,358),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XmbLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170153, (-526,30), root:(757,358),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170162, (-526,30), root:(757,358),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x3e00001,
root 0xe5, subw 0x0, time 170322, (-526,30), root:(757,358),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
Now double tap on the same key, but very slowly. It's basically NumLock - KP_7 - NumLock - NumLock - KP_7 - NumLock, which is the expected behaivor.
MappingNotify event, serial 37, synthetic NO, window 0x0,
request MappingKeyboard, first_keycode 8, count 248
KeyPress event, serial 37, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206609, (155,-52), root:(866,318),
state 0x0, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206617, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206625, (155,-52), root:(866,318),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XmbLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206657, (155,-52), root:(866,318),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206665, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
PropertyNotify event, serial 38, synthetic NO, window 0x4200001,
atom 0x19a (_NET_WM_ICON_GEOMETRY), time 206807, state PropertyNewValue
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 206825, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
PropertyNotify event, serial 38, synthetic NO, window 0x4200001,
atom 0x19a (_NET_WM_ICON_GEOMETRY), time 207060, state PropertyNewValue
KeyPress event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 209793, (155,-52), root:(866,318),
state 0x0, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 209801, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 209809, (155,-52), root:(866,318),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XmbLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
PropertyNotify event, serial 38, synthetic NO, window 0x4200001,
atom 0x19a (_NET_WM_ICON_GEOMETRY), time 209824, state PropertyNewValue
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 209849, (155,-52), root:(866,318),
state 0x10, keycode 79 (keysym 0xffb7, KP_7), same_screen YES,
XLookupString gives 1 bytes: (37) "7"
XFilterEvent returns: False
KeyPress event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 209857, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 38, synthetic NO, window 0x4200001,
root 0xe5, subw 0x0, time 210017, (155,-52), root:(866,318),
state 0x10, keycode 77 (keysym 0xff7f, Num_Lock), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
PropertyNotify event, serial 38, synthetic NO, window 0x4200001,
atom 0x19a (_NET_WM_ICON_GEOMETRY), time 210070, state PropertyNewValue
This problem is only limited to X. Under other TTYs it's working as expected, so the device is doing its job. Under X, I've tried Gnome and XFCE, both with the keyboard debouncing options turned off.
The issue does not appear if both the host and the device has numlock on. In that case the numpad would only send the pressed keys without numlock toggles, and no matter how fast I tap it gets picked up. It appears that only the numlock key triggers debouncing behavior.
What is messing with my keys and how do I turn it off?
Last edited by Balto (2015-02-08 07:38:30)

hi Roy,
are you trying to call Lync federated domains too from Cisco video network?
how did you configure TURN server at VCS Control?
please note that if you are configuring MRA on your topology you will need turn off TURN service at VCS Expressway. and I recommend you check again your firewall rules

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Good luck & happy computing!

Zen Touch users (and possibly non Zen Touch users) with Firmware issues click he

i just got back from the mall.i visited the electroworld branch from which i purchased my zen. i explained to them what my problem is, at first they recharged the player in a usb port in front of me...then they also reformatted it too...told me to stick to the firmware that came with the product..the player responded and thanked them..but hr later, it blacked out again..i came back to the store manager showed him my zen ( he couldnt deny it doesnt have a problem ) and within minutes told me...they are going to give me a replacement. (the diagnosis was AUTO-OFF). they did and im very thankful. right now im charging the new player and hoping...i mean really hoping that this zen works. because im not going to waste my time again even with that warranty. if this zen is defecti've, im gonna li've with its defect..but im going to save up for the fruit's company in my next purchase..better yet why not a new pda...i can play [size="+2"]ZEN TOUCH USERS (and possibly non Zen Touch users)!!!
OH MY GOD
!!! I can't believe it, but after at least 5 hours of troubleshooting, I got it to work!!
I don't know if all of these steps are necessary or not, but this is what I did in approximately this order (I'm so excited now, I'm not even sure if this is the exact order, but I'm almost positi've this is how I did it verbatim). I really, truly hope this works for everyone else.:
ON YOUR ZEN TOUCH:
.) Don't connect device to USB yet
2.) Clean Disk
3.) Format Disk
*Don't bother with restart firmware or reboot; these options are useless.
ON YOUR PC:
.) Do NOT connect device to USB yet.
2.) I did what everyone suggested and rolled my Windows Media Player to v0 (using Add/Remove programs in Control Panel), made sure I had SP2, had the latest drivers, blah blah blah. I'm not sure if this is necessary, but I also uninstalled my Firefox WMP plugin just to be safe. :smileyindifferent:
3.) I un-installed (using Add/Remove programs in Control Panel) and re-installed my Zen Touch drivers, both my 2.0.00 and .30.03 (.30.03 is needed ONLY if you have XP Pro 64-bit edition). I'm not sure if re-installing the drivers is even necessary, but just to be safe, let's say it is. :smileyvery-happy:
---THIS IS THE IMPORTANT PART!---
4.) I plugged my device into my USB port. When it prompts you whether you want to Sync the device with Windows Media Player or Take No Action, don't ignore it and close out. SYNC IT! I made the mistake of thinking that because my firmware was corrupted and my drivers weren't recognizing my Zen Touch as nothing more than a worthless hard dri've that there was no way it would sync with WMP. IT DOES
!!! I don't know how but it freakin' does!
5.) Open up your firmware update file and try to update again. Mine worked immediately and updated the player within seconds!
NOTE: As mentioned on Creative's Support page, probably the only thing they were right about, your device will no longer be compatible with MediaSource. If you want to add music, you have to do it with Windows Media Player 0's Sync page now. And for the love of god, don't update Windows Media Player! It's not worth it! Winamp is way better anyways!
Good luck everyone! I sincerely mean that. :manhappy:
Message Edited by invisiblephrend on 06-07-2008 :32 PMusic files in it, watch movies, save medical books etc..

I also strongly recommend that when Windows Media Player asks you whether you want to sync automatically or manually to choose the manual option. Automatic just randomly grabs music files and could likely add?music you don't want on your device.

I'd love some help trying to figure out why my 2008 MacBook no longer recognizes my external drive and now is not downloading photos from my iphone....?

After many years of having no problems at all on my Macbook, I recently figured I should finally upgrade my OS. I did that about three weeks ago, updating to Snow Leopard (10.6.8). I used Time Machine at least once after the OS upgrade but now Time Machine no longer recognizes the external drive I have used for all these years to back up. The MacBook does not "see" it. (Disk Utility does however.) The computer then also stopped recognizing another La Cie back-up that I have and now... my iPhone cannot download photos? Yikes.
I have, of course, shut down numerous times, used different cables (that worked for some) and the two USB drives. I even used a firewire. Nothing worked. I also tried to "Repair disk" on Disk Utility. It didn't work either, giving me an error (that I didn't save, sorry).
I read many other discussions on the file format of the external drive and of course I'd be happy to reformat the external drives--however, it is obviously a tad nerve-wracking to reformat drives before having an accessible back-up. Suggestions? I do not remember what file format they have but am pretty sure it's not the Mac file system someone mentioned. The drives are a 2009 WD "My Passport Elite" and La Cie 2007 d2 Quadra,
In terms of other hardware available, we do have another MacBook Air but it has started rejecting both drives as well (without the Snow Leopard upgrade). We have an old Dell but it wouldn't have the disk space to help out much.
Any thoughts on the process involved would be welcome. Any ideas on the iPhone rejection would be helpful as well! It is a 30gig iPhone 4 that has 20 or so gigs free (not clear as iTunes says that there are abour 18 Gigs on the phone but 24 free gigs? I may be bad at math but that's 40 gigs...).
I am checking out iCloud but apparently there are only 55 gigs available?
Will be glad to hear any thoughts. Thanks!

Good afternoon Lyssa,
Phew. First of all, thanks in advance...these blogs are always comforting help!
So, to answer your questions: For the age of the hard drive.Well, I added memory a couple of years ago (RAM and hard drive). Being a mom leads me to eat up a fair amount of gigs with photos of my kids and, in fact, I think I entirely replaced the original drive, so it is a couple years younger than 2008 since I did that in March 2010. If there is some way to verify that (whether or not I replaced the entire drive), I'm all ears. I have 311 Gigs free, so it is not a space issue. I verified the startup disk on Disk Utilityand nothing showed up.
Question 1- What formats...
The La Cie is format Windows NT Filesystem 3G ....At the time that I bought it I was still using a PC as well as a Mac and was told by afriend to use this format...
The WD is Mac OS Extended (Journaled). I again tried to repair the WD last night and this is the error message: "Error: DiskUtility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files."
Also, Time Machine tried again to back-up and gave me this error: "Files can't becopied onto the backup disk because it appears to be 'read only'. You may needto repair or reformat the disk using Disk Utility. If the disk can't berepaired, you must use a different disk for backups. Open Time Machinepreferences to select a different backup disk."
Question 2. Other cables...
I used two other cables with the WD and that didn't change anything.
Question 3... Fire Wire from the La Cie
Yes, I used the Firewire cable from the La Cie and it is indeed present, though still not visible in Finder. Since it is not Mac OSExtended I know that I can't use Time Machine with it.
So, in summary...
I can plug in the La Cie and it is functional on the MacBook, visible on Disk Utility but not visible in Finder. The WD drive is not visible and not functional. So we can think it is indeed the WD that is not working.... Also, the iphone photos did, in the end, get downloaded, so it is not something more general.
Causes...
I forgot to mention that there is a "lost+found" file on the WD which apparently points to a UNIX /OS issue?
Some kind of "insurance"?....
I'm curious about how people avoid this kind of issue. You just regularly replace back-up drives and hard drives before problems come up? Time Machine is great and saves many of us from disasters, however, knowing that your Time Machine back-ups are vulnerable makes the whole system insecure. No way to have alarms ring before the drive goes out?
As for ways ahead...
It seems that I ought to be able to copy off of the WD to the MacBook then erase it and reformat it and start over again. However, I haven’t been able to see its contents except on random occasions. If you have any ideas on how to copy the Time Machineback-ups from the WD, again, I'm all ears!
Good afternoon Lyssa,
Phew. First of all, thanks in advance...
So, to answer your questions:
For the age of the hard drive. Well, I added memory a coupleof years ago (RAM and hard drive). Being a mom leads me to eat up a fair amountof gigs with photos of my kids ….and, in fact, I think I entirely replaced theoriginal drive, so it is a couple years younger than 2008 since I did that inMarch 2010. If there is some way to verify that, I'm all ears. I have 311 Gigfree, so it is not a space issue. I verified the startup disk on Disk Utilityand nothing showed up.
Question 1- What formats...
The La Cie is format Windows NT Filesystem 3G ....At thetime that I bought it I was still using a PC as well as a Mac and was told by afriend to use this format...
The WD is Mac OS Extended (Journaled). I again tried torepair the WD last night and this is the error message: "Error: DiskUtility can’t repair this disk. Back up as many of your files as possible,reformat the disk, and restore your backed-up files."
Also, Time Machine tried again to back-up and gave me thiserror: "Files can't be copied onto the backup disk because it appearsto be 'read only'. You may need to repair or reformat the disk using DiskUtility. If the disk can't be repaired, you must use a different disk forbackups. Open Time Machine preferences to select a different backup disk."
Question 2. Other cables...
I used two other cables with the WD and that didn't changeanything.
Question 3... Fire Wire from the La Cie
Yes, I used the Firewire cable from the La Cie and it isindeed accessible, though still not visible in Finder. Since it is not Mac OSExtended I know that I can't use Time Machine with it.
FYI...
So, in summary... I can plug in the La Cie and it is “functional” on theMacBook but not visible in Finder. The WD drive is not visible and notfunctional. So we can think it is indeed the WD that is not working.... ALSO,the iphone photos did, in the end get downloaded.
As for ways ahead…
It seems that I ought to be able to copy off of the WD tothe MacBook then erase it and reformat it and start over again. However, Ihaven’t been able to “see” its contents except on random occasions…
Any further thoughts are welcome!

External numpad and possible debouncing issue

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