Bug 1096511

Created attachment 894419 [details]
Fix touchscreen/touchpad/suspend/als and add zram for kernel 3.14.x

Description of problem:
Since kernel 3.14.2 (including .3), suspend is broken on the Acer C720P or C720; it causes a hard reset when opening the screen.

Version-Release number of selected component (if applicable):
3.14.2 and 3.14.3

How reproducible:
close and open the screen. Works everytime

Steps to Reproduce:
1.close the screen
2.open the screen
3.the computer exhibit a hard reset

Actual results:
hard reset

Expected results:
suspend should work

Additional info:
This patch is the cause of the issue:
https://github.com/torvalds/linux/commit/1569a4c4ceba
Reverting it fix the issue.

Relevant parts of the script fixing this issue:
***
# Fix suspend by reverting drivers/char/tpm/tpm_ppi.c to kernel 3.13 behavior
wget -O - https://github.com/torvalds/linux/commit/1569a4c4ceba.patch | patch -p1 -R

# Suspend
cd drivers/char/tpm/
mv Makefile Makefile.orig
echo 'KERNELVERSION = '$archkernver'
obj-m += tpm.o
tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o
tpm-y += tpm_ppi.o
tpm-y += tpm_eventlog.o tpm_acpi.o

KDIR  := /lib/modules/$(shell uname -r)/build
PWD   := $(shell pwd)

default:
	$(MAKE) -C $(KDIR) M=$(PWD) modules' > Makefile
make -C /lib/modules/$archkernver/build M=$PWD modules
rm Makefile
mv Makefile.orig Makefile
cd ../../..

mkdir -p /lib/modules/$archkernver/kernel/drivers/char/tpm/ && cp drivers/char/tpm/tpm.ko /lib/modules/$archkernver/kernel/drivers/char/tpm/

***
Grub must also be updated with those options:
in /etc/default/grub, add:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash tpm_tis.force=1 tpm_tis.interrupts=0"

Update grub:

# grub2-mkconfig -o /boot/grub2/grub.cfg

"tpm_tis.interrupts=0" is the necessary part. As my spare time is rare, I've not tested removeing the other options.

Reference for who had find the fix:
https://bbs.archlinux.org/viewtopic.php?id=173418&p=8
Posts #195 and #208