I have an issue with the touchpad on my notebook where if I use it, it causes a high amount of interrupts which results in significantly higher CPU usage and power drain. The following snippet is after 5 minutes of powering the device on. Notice the amount of interrupts on IRQ 17 in comparison to the rest.
cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
0: 8 0 0 0 0 0 0 0 IR-IO-APIC 2-edge timer
1: 0 0 0 0 0 0 0 1350 IR-IO-APIC 1-edge i8042
8: 0 1 0 0 0 0 0 0 IR-IO-APIC 8-edge rtc0
9: 0 31 0 0 0 0 0 0 IR-IO-APIC 9-fasteoi acpi
14: 0 0 14671 0 0 0 0 0 IR-IO-APIC 14-fasteoi INT344B:00
16: 0 0 0 6167 0 0 0 0 IR-IO-APIC 16-fasteoi i801_smbus, idma64.0, i2c_designware.0
17: 0 0 0 0 604999 0 0 0 IR-IO-APIC 17-fasteoi idma64.1, i2c_designware.1
20: 0 0 0 0 0 0 0 0 IR-IO-APIC 20-fasteoi idma64.2
23: 0 0 0 0 0 0 0 0 IR-IO-APIC 23-fasteoi idma64.3, pxa2xx-spi.3
120: 0 0 0 0 0 0 0 0 DMAR-MSI 0-edge dmar0
121: 0 0 0 0 0 0 0 0 DMAR-MSI 1-edge dmar1
In threads with similar issues it was recommended to blacklist i2c_designware
or intel_lpss_pci
but neither helped in my case. Using the kernel parameter initcall_blacklist=dw_i2c_init_driver
as recommended here lead to my touchpad not being recognized at all anymore. There also is no BIOS parameter or something similar to switch trackpad modes. Is there anything else I can try or am I stuck with using my mouse until this is fixed in the kernel?
cat /proc/bus/input/devices | grep i2c -B2 -A7
I: Bus=0018 Vendor=06cb Product=19ac Version=0100
N: Name="SYNA2393:00 06CB:19AC"
P: Phys=i2c-SYNA2393:00
S: Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-SYNA2393:00/0018:06CB:19AC.0001/input/input23
U: Uniq=
H: Handlers=mouse0 event8
B: PROP=2
B: EV=1b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003
B: MSC=20
--
I: Bus=0018 Vendor=06cb Product=cd48 Version=0100
N: Name="SYNA1D31:00 06CB:CD48 Mouse"
P: Phys=i2c-SYNA1D31:00
S: Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-SYNA1D31:00/0018:06CB:CD48.0002/input/input27
U: Uniq=
H: Handlers=mouse1 event9
B: PROP=0
B: EV=17
B: KEY=30000 0 0 0 0
B: REL=3
B: MSC=10
--
I: Bus=0018 Vendor=06cb Product=cd48 Version=0100
N: Name="SYNA1D31:00 06CB:CD48 Touchpad"
P: Phys=i2c-SYNA1D31:00
S: Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-SYNA1D31:00/0018:06CB:CD48.0002/input/input28
U: Uniq=
H: Handlers=mouse2 event10
B: PROP=5
B: EV=1b
B: KEY=e520 10000 0 0 0 0
B: ABS=2e0800000000003
B: MSC=20
lspci -nnkv | grep 'IRQ 17' -B3 -A4
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
Subsystem: Huawei Technologies Co., Ltd. Sunrise Point-LP Serial IO I2C Controller [19e5:3e04]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at 2ff3020000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci