Comment 16 for bug 1558489

Hi there,
I would like to add further details on this issue I'm experiencing on an Acer Aspire ES1-711-P0HA. It has been worked fine up to kernel 3.19.0-51, then no working touchpad from 3.19.0-56 onwards.

Following two excerpts of "dmesg" and "syslog" for each kernel 3.19.0-51 and 3.19.0-58. As you can see the ELAN0501:00 04F3:300B touchpad device is recognized from the -51 kernel, whereas the -58 kernel times out the 80860F41:00 controller and isn't be able to initialize the device driver.
For sake of completness I have to report just one unrepeated event where the touchpad has worked with kernel -56.
A last detail, that I found at least unusual, is that the kernel 3.19.0-51 has been compiled with gcc version 4.8.4, whereas the last kernel version 3.19.0-58 has been compiled with the previous gcc version 4.8.2.

# dmesg
[ 0.000000] Linux version 3.19.0-51-generic (buildd@lgw01-44) (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.1) ) #58~14.04.1-Ubuntu SMP Fri Feb 26 22:02:58 UTC 2016 (Ubuntu 3.19.0-51.58~14.04.1-generic 3.19.8-ckt13)
...
[ 11.227663] i2c_hid i2c-ELAN0501:00: error in i2c_hid_init_report size:633 / ret_size:7
[ 11.230537] i2c_hid i2c-ELAN0501:00: error in i2c_hid_init_report size:69 / ret_size:7
[ 11.242881] input: ELAN0501:00 04F3:300B UNKNOWN as /devices/platform/80860F41:00/i2c-0/i2c-ELAN0501:00/0018:04F3:300B.0001/input/input7
[ 11.243142] hid-multitouch 0018:04F3:300B.0001: input,hidraw0: <UNKNOWN> HID v1.00 Mouse [ELAN0501:00 04F3:300B] on

# /var/log/syslog
Apr 8 11:04:22 aspire-es1 kernel: [ 11.227663] i2c_hid i2c-ELAN0501:00: error in i2c_hid_init_report size:633 / ret_size:7
Apr 8 11:04:22 aspire-es1 kernel: [ 11.230537] i2c_hid i2c-ELAN0501:00: error in i2c_hid_init_report size:69 / ret_size:7
Apr 8 11:04:22 aspire-es1 kernel: [ 11.242881] input: ELAN0501:00 04F3:300B UNKNOWN as /devices/platform/80860F41:00/i2c-0/i2c-ELAN0501:00/0018:04F3:300B.0001/input/input7
Apr 8 11:04:22 aspire-es1 kernel: [ 11.243142] hid-multitouch 0018:04F3:300B.0001: input,hidraw0: <UNKNOWN> HID v1.00 Mouse [ELAN0501:00 04F3:300B] on

# dmesg
[ 0.000000] Linux version 3.19.0-58-generic (buildd@lgw01-39) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:43 UTC 2016 (Ubuntu 3.19.0-58.64~14.04.1-generic 3.19.8-ckt16)
...
[ 13.083635] i2c_designware 80860F41:00: controller timed out
[ 13.083665] i2c_designware 80860F41:00: Unknown Synopsys component type: 0x00000000
[ 13.083692] i2c_hid i2c-ELAN0501:00: hid_descr_cmd failed

# /var/log/syslog
Apr 8 10:36:01 aspire-es1 kernel: [ 13.495927] i2c_designware 80860F41:00: controller timed out
Apr 8 10:36:01 aspire-es1 kernel: [ 13.495938] i2c_designware 80860F41:00: Unknown Synopsys component type: 0x00000000
Apr 8 10:36:01 aspire-es1 kernel: [ 13.495947] i2c_hid i2c-ELAN0501:00: hid_descr_cmd failed