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I had Natty 11.04 on my computer, and the touch-screen worked perfectly.

I have now installed Precise 12.04 (fresh installation, fully updated), and the touch-screen is no longer recognised.

"xinput --list" on Natty gives:

⎡ Virtual core pointer                            id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                  id=4    [slave  pointer  (2)]
⎜   ↳ Lite-On Technology Corp. Wireless Device    id=11   [slave  pointer  (2)]
⎜   ↳ Lite-On Technology Corp. Wireless Device    id=12   [slave  pointer  (2)]
⎜   ↳ Quanta Computer OpticalTouchScreen          id=9    [slave  pointer  (2)]
⎣ Virtual core keyboard                           id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard                 id=5    [slave  keyboard (3)]
    ↳ Power Button                                id=6    [slave  keyboard (3)]
    ↳ Power Button                                id=7    [slave  keyboard (3)]
    ↳ CNFA257                                     id=8    [slave  keyboard (3)]
    ↳ Lite-On Technology Corp. Wireless Device    id=10   [slave  keyboard (3)]

However, on 12.04, "xinput --list" gives:

⎡ Virtual core pointer                            id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                  id=4    [slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                       id=10   [slave  pointer  (2)]
⎣ Virtual core keyboard                           id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard                 id=5    [slave  keyboard (3)]
    ↳ Power Button                                id=6    [slave  keyboard (3)]
    ↳ Power Button                                id=7    [slave  keyboard (3)]
    ↳ CNFA257                                     id=8    [slave  keyboard (3)]
    ↳ Logitech USB Receiver                       id=9    [slave  keyboard (3)]

Notice that xinput on 12.04 does not list the "Quanta Computer OpticalTouchScreen". (It has also changed the wording of the wireless device, but the wireless works correctly.)

What can I do to get the touch-screen to work again?

More information

lsusb shows:

Bus 001 Device 004: ID 0408:3003 Quanta Computer, Inc.

According to the bug, it has been solved in the current Precise version, which I have. uname -a shows:

Linux Daisy 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

However, it doesn't work for me. So, I don't know where to go from here.

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Check this: askubuntu.com/questions/129448/… Do you have the same touchscreen? –  int_ua May 12 '12 at 0:07
    
Aargh! How do I format this comment to make it readable? It appears to be the same touchscreen, almost: lsusb shows Bus 001 Device 004: ID 0408:3003 Quanta Computer, Inc. However, the bug report says that it is fixed in the latest version, which I have: Linux Daisy 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux So I don't know where to go from here. –  Paddy Landau May 12 '12 at 8:50
    
I have added the new information to my original question (above) as I couldn't format the comment. –  Paddy Landau May 12 '12 at 8:57
    
Does it have a multitouch support? Then you should report it here: lii-enac.fr/en/architecture/linux-input/… Or just file a new bug report with apport-bug linux describing the situation. –  int_ua May 12 '12 at 12:09
1  
I have submitted a bug report bugs.launchpad.net/ubuntu/+source/linux/+bug/998546 and I have submitted to lii-enac as suggested. I hope I've done the right thing. –  Paddy Landau May 12 '12 at 20:33
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closed as off topic by Minato Namikaze, nitstorm, Thomas W., belacqua, Stephen Myall Nov 10 '12 at 23:59

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1 Answer

According to TheFanClub 11.04 had the software "utouch" installed by default. This is not the case in 12.04. See http://www.thefanclub.co.za/how-to/how-ubuntu-1204-touchscreen-calibration

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1  
Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. –  Peachy Oct 4 '12 at 13:10
1  
Thank you for the link. Unfortunately, the xcalibrate program merely displays, "Error: No calibratable devices found." I have been in touch with lii-enac as suggested. The person in question did find the problem — it lay with the kernel — but I have been unable to ascertain when the fix will be implemented. –  Paddy Landau Oct 5 '12 at 11:17
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