Keyboard problem, 'linked' keys

Hey there,
I'm having problems with the keyboard on my Mid '11 15" MacBook Pro. Some keys appear to be 'linked' to others. For example; typing a '1' also presses the 'volume up' (F12`) key. Here's some other examples (I'm only typing the numbers here, the symbols are typing themselves);
2`
3§
4]
5[
6=
Also the up arrow key types a 9 and the right arrow key types an 8
I've checked the language/mapping setup and all appears to be normal. I've also checked the 'Keyboard Viewer' which shows the behaviour I detailed above, two keys being pressed at the same time.
I've done an Apple Hardware Test which came back clean, repaired permissions, done the usual PRAM/SMC reset and nothing has fixed it. The laptop hasn't suffered any impact or anything, it literally just started happening this morning.
Any ideas before I make an appointment at the Genius Bar? I've just had this MacBook Back a month ago after the HDD failed, and I really don't fancy losing another two days cloning my HDD or reinstalling all my software.
Specs are: 10.6.8, 2.2Ghz i7, 8GB RAM, HD6750, 750GB HDD.
Thanks!

Likely Tom Gewecke is right. But two other things you could try.
(1) Try a different user account, or the Guest account. Same problem?
(2) Try booting from another device (eg, SL DVD). Same problem?
If a different account doesn't show the issue, then the problem is most likely software, and it's in the user domain.
If another boot device doesn't show the same problem, it may be a software issue; but I don't know how you could fix it other than re-installing the OS.

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I tried replacing the keyboard but the new keyboard has the same problem.
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Any help would be appreciated as I am now in Los Angeles using a borrowed Mac! :-)

i have something along the lines of the same problem.
http://bbs.archlinux.org/viewtopic.php?id=56777
my conclusion is something in the last system update screwed it up.

Keyboard problem: some keys seem to be linked.

Example: if I press the 1 key it turns the volume up. It just happened minutes ago. Please help!

lacue wrote:
Something is seriously wrong with this.
Yes. It sounds like a hardware problem. Try an external keyboard and/or try booting from the Install DVD or Recovery partition and test. If the symptom is the same, next stop is the Apple Store or AASP.

Laptop Keyboard problem, some keys get randomly ignored

Hello,
This is a problem that occurs with all razer blade notebooks when running linux (does not occur in Windows 8); some keys get randomly ignored when you type at your normal speed, and it is very frustating especially when typing passwords or programming. At the moment we have to type very slowly in order to get all keystrokes caught. The keyboard has antighosting technology, maybe that info is useful.
This is the further we went in this post:
https://bbs.archlinux.org/viewtopic.php?id=161634
In that post, a forum partner proposed to modify "drivers/hid/usbhid/hid-core.c" and set "interval = 1;" right after the mouse pooling interval was set, around line 1134 of the file. When we use that modified kernel, the keyboard feels a little better but i still get ignored keys when typing at normal speed.
This are my usb devices:
[cristobal@orion ~]$ lsusb -vv -d 1532:
Bus 001 Device 003: ID 1532:0116 Razer USA, Ltd
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1532 Razer USA, Ltd
idProduct 0x0116
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 123
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 2 Mouse
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 75
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 159
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 71
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 240
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Does anyone know, based on their experience, what could be the cause of the keyboard malfunction?
Does this type of error occur for some other notebooks too?
It would be great if someone could point me in the right direction for where to look.
Last edited by labotsirc (2013-08-31 17:27:38)

Jeroen)Mathon wrote:
A lot of people i know that are running arch with a Razorblade keyboard are seeming to be having a lot of problems.
Did the same happened to another keyboard like an (HP,Dell,Logitech,etc).
For all i know (Not a lot) I'm thinking it might have something to do with your usb?(Worst answer ever!)
Did you try a different port.
Please let me know if this worked .
On the side(What kernel version are you running?)
Hi. Well in this case the problem is with the Razer Blade Laptop's keyboard, therefore i cannot choose another port. You gave me an idea however, i will try to get any usb keyboard, plug it into the razer blade and make sure it works so that i can discard any major problem.

Keyboard problem--transposed keys

Today, my keyboard started transposing numerous keys as I type; as in--
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I can barely type a coherent message here with this keyboard
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Hi Rod--
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I use PickChar on my iMac to simplify handling of esoteric font characters. Its overhead menu symbol at the upper right of my desktop usually shows the American flag (for the English setting). I just noticed that the symbol had somehow spontaneously changed to the French flag (and the French setting). I switched it back to the English setting and all is fixed and okay with the keyboard.
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Thank you mishmumken,
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Keyboard problems, not working keys and different connection with letters

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In daily use: R60F, R500F, T61, T410
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Hi Rob,
Welcome to Apple Support Communities.
It sounds like your running into an issue with the keyboard on your MacBook Pro. The article linked below provides suggestions that will resolve most keyboard issues like the one you described.
OS X Mavericks: If keys on your keyboard don’t work
http://support.apple.com/kb/PH13809
If other keys don’t work
You may have accidentally set an option that changes how your keyboard operates.
Choose Apple menu > System Preferences, click Dictation & Speech, then click “Text to Speech.” If “Speak selected text when the key is pressed” is selected, deselect it or click Change Key to select another key.
Choose Apple menu > System Preferences, click Accessibility, then click Keyboard. Make sure Slow Keys is turned off. If Slow Keys is on, you must hold down a key longer than usual before it’s recognized.
Choose Apple menu > System Preferences, click Accessibility, then click Mouse & Trackpad. Make sure Mouse Keys is off. If Mouse Keys is on, pressing keys in the numeric keypad moves the pointer instead of entering numbers.
Choose Apple menu > System Preferences, click Keyboard, then click Input Sources. Select “Show Input menu in menu bar.” Open the Input menu and make sure the correct keyboard layout is selected. To see the keyboard layout, click Keyboard, then choose “Show Keyboard & Character Viewers in menu bar.”
I hope this helps.
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I've made sure I'm not touching any other part of the screen as a possible cause. Showed it to and had three other iPhone users see what I see and they all agree it seems like a bug, just to confirm it's not me.
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Well, I took my 16GB iPhone 3g (white) back to the Apple Store today and the Genius looked it over -- said that's the first keyboard problem he's seen come in and mentioned that it was strange the "dead zone" on the touch screen was vertical since, according to him, most "dead zones" tend to be horizontal areas. He said the touch screen matrix is laid out in three horizontal bands on the screens.
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HELP! Keyboard problems

HELP!
I have tried all sorts of things, like:
- removed syst prefs to desktop then restarted
- un-done, re-done, re-booted various options in International and Keyboard & Mouse
- run disk utility, both from startup CD AND in target disk mode
- ran permission smasher
- swapped out different keyboards and/or mice
...but these are my keyboard problem symptoms:
- numeric keypad not working
- the shift key (for caps & shift characters) not working&
- commands (i.e., "Select All") not working
...the keyboard does not work in any native Mac appl (e.g., Mail, Safari, TextEdit).
The only time my keyboard will work correctly is when I create a test new user and log-in. So it's just for me as user.
Also, oddly enough, keyboard prefs do not show up anywhere.
Anyplace where I should see something, such as
Library>preferences - there should be a file com.apple.keyboardtype.plist --- there is no file in any of the folders anywhere.
All of a sudden the keyboard stopped working, but the mouse attached to it still works. I have no clue what to do to fix it and my AppleCare has ran out.
Other things I have noticed and tried:
- running tech tool
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- switching usb ports for the keyboard from the back of the display
- removing the mouse from the back of the keyboard
- unplugging everything but the keyboard and mouse
...any ideas???

Hi, DR -
The numeric keypad not working sounds like MouseKeys became enabled in the Universal Access part of System Preferences.
The Shift key and Command keys not working sounds like Sticky Keys became enabled in the Universal Access part of System Preferences.
Check the Universal Access control pane in System Preferences - if those features are checkmarked, try unchecking them.

Keyboard problem, 'linked' keys

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