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Edit:
Potentially solved: since adding the below entries to my bootloader I have not encountered the issue, or it may be just a coincidence.append to the boot line: i8042.nomux=1 i8042.reset
I've been experiencing an issue for the last few years which has bugged me across two different brands of laptop, but has been very hard to debug due to how random the event seems to occur.
One in every 20 or so boots, the touchpad on my laptop (Lenovo Z500) is not detected; not just by X, but by the system as a whole, it's as if it has been physically disconnected somehow.
It will take a few good reboots for the system to detect it again, and the problem disappears for another few days/weeks
One strange thing I have noticed, is that when looking at the listing of interrupts during a 'failed touchpad boot', IRQ 12, which I believe is normally the touchpad, has vanished.
I'm not very clued up on these matters so I'm not sure how to start debugging this, and working out if the issue is down to my setup of the system or not.
Any ideas on what could be causing this?
Thanks.
Output of /proc/interrupts during a working boot:
CPU0 CPU1 CPU2 CPU3
0: 23 0 0 0 IO-APIC-edge timer
1: 16 723 9 10 IO-APIC-edge i8042
8: 0 0 0 1 IO-APIC-edge rtc0
9: 299 118 10 14 IO-APIC-fasteoi acpi
12: 845 21415 146 77 IO-APIC-edge i8042
16: 461 8993 74 44 IO-APIC-fasteoi ehci_hcd:usb1
17: 0 0 0 0 IO-APIC-fasteoi ath9k
23: 2 25 5 1 IO-APIC-fasteoi ehci_hcd:usb2
41: 5 22 0 2 PCI-MSI-edge xhci_hcd
42: 1557 1065 596 500 PCI-MSI-edge ahci
43: 11 2 0 0 PCI-MSI-edge mei_me
44: 266 0 0 0 PCI-MSI-edge snd_hda_intel
46: 4 28 26 1 PCI-MSI-edge i915
NMI: 0 0 0 0 Non-maskable interrupts
LOC: 3002 12958 2572 1842 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 0 0 0 0 Performance monitoring interrupts
IWI: 88 170 115 197 IRQ work interrupts
RTR: 1 0 0 0 APIC ICR read retries
RES: 367 332 393 431 Rescheduling interrupts
CAL: 129 71 24 58 Function call interrupts
TLB: 99 72 157 892 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 2 2 2 2 Machine check polls
THR: 0 0 0 0 Hypervisor callback interrupts
ERR: 0
MIS: 0Output of /proc/interrupts during a non-working boot:
CPU0 CPU1 CPU2 CPU3
0: 23 0 0 0 IO-APIC-edge timer
1: 9 235 2 11 IO-APIC-edge i8042
8: 0 0 1 0 IO-APIC-edge rtc0
9: 217 44 24 40 IO-APIC-fasteoi acpi
16: 96 2512 38 173 IO-APIC-fasteoi ehci_hcd:usb1
17: 0 0 0 0 IO-APIC-fasteoi ath9k
23: 3 25 1 4 IO-APIC-fasteoi ehci_hcd:usb2
41: 6 23 0 1 PCI-MSI-edge xhci_hcd
42: 1445 937 649 479 PCI-MSI-edge ahci
43: 9 3 0 1 PCI-MSI-edge mei_me
45: 11 10 4 39 PCI-MSI-edge i915
46: 93 80 94 0 PCI-MSI-edge snd_hda_intel
NMI: 0 0 0 0 Non-maskable interrupts
LOC: 1251 3465 1964 692 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 0 0 0 0 Performance monitoring interrupts
IWI: 76 97 47 79 IRQ work interrupts
RTR: 1 0 0 0 APIC ICR read retries
RES: 349 252 190 335 Rescheduling interrupts
CAL: 110 72 30 69 Function call interrupts
TLB: 101 52 817 651 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 2 2 2 2 Machine check polls
THR: 0 0 0 0 Hypervisor callback interrupts
ERR: 0
MIS: 0Output of /proc/bus/input/devices during a working boot (touchpad detected at bus 0011):
I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01/PNP0C0C:00/input/input2
U: Uniq=
H: Handlers=kbd event1
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input3
U: Uniq=
H: Handlers=event2
B: PROP=0
B: EV=21
B: SW=1
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input4
U: Uniq=
H: Handlers=kbd event3
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Ideapad extra buttons"
P: Phys=ideapad/input0
S: Sysfs=/devices/platform/VPC2004:00/input/input5
U: Uniq=
H: Handlers=kbd rfkill event4
B: PROP=0
B: EV=13
B: KEY=1400800100c03 400000000300000 0 0
B: MSC=10
I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input7
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=40001
B: SND=6
I: Bus=0003 Vendor=13d3 Product=5170 Version=0730
N: Name="Lenovo EasyCamera"
P: Phys=usb-0000:00:14.0-4/button
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/input/input9
U: Uniq=
H: Handlers=kbd event6
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0
I: Bus=0001 Vendor=10ec Product=0269 Version=0001
N: Name="HDA Digital PCBeep"
P: Phys=card0/codec#0/beep0
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/hdaudioC0D0/input8
U: Uniq=
H: Handlers=kbd event7
B: PROP=0
B: EV=40001
B: SND=6
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input10
U: Uniq=
H: Handlers=event8
B: PROP=0
B: EV=21
B: SW=10
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input11
U: Uniq=
H: Handlers=event9
B: PROP=0
B: EV=21
B: SW=4
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input12
U: Uniq=
H: Handlers=event10
B: PROP=0
B: EV=21
B: SW=140
I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
N: Name="SynPS/2 Synaptics TouchPad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input6
U: Uniq=
H: Handlers=event11 mouse0
B: PROP=5
B: EV=b
B: KEY=e520 10000 0 0 0 0
B: ABS=660800011000003
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:35/LNXVIDEO:00/input/input13
U: Uniq=
H: Handlers=kbd event12
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:03/input/input14
U: Uniq=
H: Handlers=kbd event13
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0Output of /proc/bus/input/devices during a non-working boot:
I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input2
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01/PNP0C0C:00/input/input3
U: Uniq=
H: Handlers=kbd event1
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input4
U: Uniq=
H: Handlers=event2
B: PROP=0
B: EV=21
B: SW=1
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input5
U: Uniq=
H: Handlers=kbd event3
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Ideapad extra buttons"
P: Phys=ideapad/input0
S: Sysfs=/devices/platform/VPC2004:00/input/input6
U: Uniq=
H: Handlers=kbd rfkill event4
B: PROP=0
B: EV=13
B: KEY=1400800100c03 400000000300000 0 0
B: MSC=10
I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input7
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=40001
B: SND=6
I: Bus=0003 Vendor=13d3 Product=5170 Version=0730
N: Name="Lenovo EasyCamera"
P: Phys=usb-0000:00:14.0-4/button
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/input/input8
U: Uniq=
H: Handlers=kbd event6
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:35/LNXVIDEO:00/input/input9
U: Uniq=
H: Handlers=kbd event7
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:03/input/input10
U: Uniq=
H: Handlers=kbd event8
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0
I: Bus=0001 Vendor=10ec Product=0269 Version=0001
N: Name="HDA Digital PCBeep"
P: Phys=card0/codec#0/beep0
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/hdaudioC0D0/input11
U: Uniq=
H: Handlers=kbd event9
B: PROP=0
B: EV=40001
B: SND=6
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input12
U: Uniq=
H: Handlers=event10
B: PROP=0
B: EV=21
B: SW=10
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input13
U: Uniq=
H: Handlers=event11
B: PROP=0
B: EV=21
B: SW=4
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input14
U: Uniq=
H: Handlers=event12
B: PROP=0
B: EV=21
B: SW=140Last edited by kYd (2014-07-01 18:11:45)
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