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[Bug 1359997] Re: Touchpad of HP Chromebook 14 no longer works with latest kernel

 

** Attachment added: "Output of lspci"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359997/+attachment/4184111/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1359997

Title:
  Touchpad of HP Chromebook 14 no longer works with latest kernel

Status in “linux” package in Ubuntu:
  New

Bug description:
  After the recent upgrade to the 3.13.0-34 kernel the touchpad on the
  HP Chromebook 14 with Ubuntu 14.04 installed via chrubuntu no longer
  works. By booting up with the previous version of the kernel which is
  3.13.0-32, the touch pad works fine.

  $ lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  With version 3.13.0-32 lshw returns the following for the serial ports:
          *-serial:0
               description: Serial bus controller
               product: Lynx Point-LP I2C Controller #0
               vendor: Intel Corporation
               physical id: 15.1
               bus info: pci@0000:00:15.1
               version: 04
               width: 32 bits
               clock: 33MHz
               capabilities: pm bus_master cap_list
               configuration: driver=i2c-designware-pci latency=0
               resources: irq:21 memory:e051a000-e051afff memory:e051b000-e051bfff
          *-serial:1
               description: Serial bus controller
               product: Lynx Point-LP I2C Controller #1
               vendor: Intel Corporation
               physical id: 15.2
               bus info: pci@0000:00:15.2
               version: 04
               width: 32 bits
               clock: 33MHz
               capabilities: pm bus_master cap_list
               configuration: driver=i2c-designware-pci latency=0
               resources: irq:21 memory:e051c000-e051cfff memory:e051d000-e051dfff

  whereas with 3.13.0-34 it returns:
          *-serial:0 UNCLAIMED
               description: Serial bus controller
               product: Lynx Point-LP I2C Controller #0
               vendor: Intel Corporation
               physical id: 15.1
               bus info: pci@0000:00:15.1
               version: 04
               width: 32 bits
               clock: 33MHz
               capabilities: pm bus_master cap_list
               configuration: latency=0
               resources: memory:e051a000-e051afff memory:e051b000-e051bfff
          *-serial:1 UNCLAIMED
               description: Serial bus controller
               product: Lynx Point-LP I2C Controller #1
               vendor: Intel Corporation
               physical id: 15.2
               bus info: pci@0000:00:15.2
               version: 04
               width: 32 bits
               clock: 33MHz
               capabilities: pm bus_master cap_list
               configuration: latency=0
               resources: memory:e051c000-e051cfff memory:e051d000-e051dfff

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