Disappearing IRQ 17 !?!
-----------------------------------------
Here it is:
roger@roger-desktop:~$ sudo dmesg|grep tty
[sudo] password for roger:
[ 0.000000] console [tty0] enabled
[ 1.457141] 0000:04:01.0: ttyS4 at I/O 0xd000 (irq = 17) is a 16550A
[ 1.660953] tty tty33: hash matches
roger@roger-desktop:~$
------------------------------------------------------
Here is isn't
roger@roger-desktop:~$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5
CPU6 CPU7
0: 126 0 0 0 0 0
0 0 IR-IO-APIC-edge timer
1: 3 0 0 0 0 0
0 0 IR-IO-APIC-edge i8042
8: 1 0 0 0 0 0
0 0 IR-IO-APIC-edge rtc0
9: 0 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi acpi
12: 4 0 0 0 0 0
0 0 IR-IO-APIC-edge i8042
16: 200001 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi ehci_hcd:usb1
18: 0 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi firewire_ohci
23: 365444 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi ehci_hcd:usb2
40: 0 0 0 0 0 0
0 0 DMAR_MSI-edge dmar0
42: 285646 0 0 0 0 0
0 0 IR-PCI-MSI-edge ahci
43: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge ahci
...
------------------------------------------------------
Back again!
from sudo lshw
*-communication
description: Serial controller
product: 56K FaxModem Model 5610
vendor: 3Com Corp, Modem Division
physical id: 1
bus info: pci@0000:04:01.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm 16550 cap_list
configuration: driver=serial latency=0
resources: irq:17 ioport:d000(size=8)
--------------------------------------------------------------------------
POOF - gone again!!!
roger@roger-desktop:~$ lsdev
Device DMA IRQ I/O Ports
------------------------------------------------
0000:00:19.0 f040-f05f
0000:00:1f.2 f020-f03f f060-f063 f070-f077 f080-f083
f090-f097
0000:00:1f.3 f000-f01f
0000:01:00.0 e000-e0ff
0000:04:01.0 d000-d007
0000:06:00.0 c000-c00f c010-c013 c020-c027
c030-c033 c040-c047
acpi 9
ACPI 0400-0403 0404-0405 0408-040b
0410-0415 0420-042f 0450-0450
ahci 42 43 c000-c00f c010-c013 c020-c027
c030-c033 c040-c047 f020-f03f f060-f063 f070-f077
f080-f083 f090-f097
cascade 4
dma 0080-008f
dma1 0000-001f
dma2 00c0-00df
dmar0 40
ehci_hcd:usb1 16
ehci_hcd:usb2 23
eth0 53
fglrx[0]@PCI:1:0:0 56
firewire_ohci 18
fpu 00f0-00ff
i8042 1 12
keyboard 0060-0060 0064-0064
mei 54
PCI 0000-0cf7 0cf8-0cff 0d00-ffff 2000-2fff
c000-cfff d000-dfff d000-dfff e000-efff
pic1 0020-0021
pic2 00a0-00a1
pnp 0200-020f 0400-0453 0454-0457 0458-047f
04d0-04d1 0500-057f 0680-069f 0a00-0a0f 164e-164f ffff-ffff
ffff-ffff
rtc0 8 0070-0077
serial d000-d007
snd_hda_intel 55
timer 0
timer0 0040-0043
timer1 0050-0053
vesafb 03c0-03df
w83627ehf 0a05-0a06 0a05-0a06
xhci_hcd 44 45 46 47 48 49 50 51 52
roger@roger-desktop:~$
-----------------------------------------------------------------------------
Still missing...
roger@roger-desktop:~$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5
CPU6 CPU7
0: 128 0 0 0 0 0
0 0 IR-IO-APIC-edge timer
1: 3 0 0 0 0 0
0 0 IR-IO-APIC-edge i8042
8: 1 0 0 0 0 0
0 0 IR-IO-APIC-edge rtc0
9: 0 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi acpi
12: 4 0 0 0 0 0
0 0 IR-IO-APIC-edge i8042
16: 200001 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi ehci_hcd:usb1
18: 0 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi firewire_ohci
23: 380894 0 0 0 0 0
0 0 IR-IO-APIC-fasteoi ehci_hcd:usb2
40: 0 0 0 0 0 0
0 0 DMAR_MSI-edge dmar0
42: 286967 0 0 0 0 0
0 0 IR-PCI-MSI-edge ahci
43: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge ahci
44: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
45: 1 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
46: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
47: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
48: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
49: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
50: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
51: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
52: 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge xhci_hcd
53: 387086 0 0 0 0 0
0 0 IR-PCI-MSI-edge eth0
54: 15 0 0 0 0 0
0 0 IR-PCI-MSI-edge mei
55: 457 71 0 0 0 0
0 0 IR-PCI-MSI-edge snd_hda_intel
56: 1490942 0 0 0 0 0
0 0 IR-PCI-MSI-edge fglrx[0]@PCI:1:0:0
NMI: 147 141 118 121 23 24
24 25 Non-maskable interrupts
LOC: 3071820 3143660 3146276 3063127 1902366 2065757
2406740 1542871 Local timer interrupts
SPU: 0 0 0 0 0 0
0 0 Spurious interrupts
PMI: 147 141 118 121 23 24
24 25 Performance monitoring interrupts
IWI: 0 0 0 0 0 0
0 0 IRQ work interrupts
RES: 3622679 3643198 3349856 3556317 1486992 1663527
1940060 1052250 Rescheduling interrupts
CAL: 107783 186310 216456 187773 289026 257368
341266 185841 Function call interrupts
TLB: 48657 99818 82465 84859 7023 7860
9827 8494 TLB shootdowns
TRM: 0 0 0 0 0 0
0 0 Thermal event interrupts
THR: 0 0 0 0 0 0
0 0 Threshold APIC interrupts
MCE: 0 0 0 0 0 0
0 0 Machine check exceptions
MCP: 87 87 87 87 87 87
87 87 Machine check polls
---------------------------------------------------------------------------------------------------------------------------
Gone forever?
roger@roger-desktop:~$ procinfo
Memory: Total Used Free Buffers
RAM: 16401300 2721500 13679800 116388
Swap: 16741372 0 16741372
Bootup: Thu Apr 11 17:19:06 2013 Load average: 0.11 0.18 0.22 2/404
6286
user : 00:43:26.51 1.3% page in : 3409720
nice : 00:00:01.67 0.0% page out: 3914015
system: 00:26:16.73 0.8% page act: 247041
IOwait: 00:08:40.23 0.3% page dea: 0
hw irq: 00:00:00.01 0.0% page flt: 38258155
sw irq: 00:00:04.83 0.0% swap in : 0
idle : 2d 07:43:19.14 97.7% swap out: 0
uptime: 07:09:03.96 context : 61303833
irq 0: 128 timer irq 45: 1 xhci_hcd
irq 1: 3 i8042 irq 46: 0 xhci_hcd
irq 8: 1 rtc0 irq 47: 0 xhci_hcd
irq 9: 0 acpi irq 48: 0 xhci_hcd
irq 12: 4 i8042 irq 49: 0 xhci_hcd
irq 16: 200001 ehci_hcd:usb1 irq 50: 0 xhci_hcd
irq 18: 0 firewire_ohci irq 51: 0 xhci_hcd
irq 23: 383342 ehci_hcd:usb2 irq 52: 0 xhci_hcd
irq 40: 0 dmar0 irq 53: 387184 eth0
irq 42: 287131 ahci irq 54: 15 mei
irq 43: 0 ahci irq 55: 528 snd_hda_intel
irq 44: 0 xhci_hcd irq 56: 1499437 fglrx[0]@PCI:1:0:
sda 158230r 110486w sdc 0r 0w
sdb 0r 0w
eth0 TX 26.99MiB RX 458.53MiB lo TX 595.99KiB RX
595.99KiB
roger@roger-desktop:~$
--------------------------------------------------------
Nope - as in the famous movie line - "I'M BACK"
sudo cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:unknown port:000003F8 irq:4
1: uart:unknown port:000002F8 irq:3
2: uart:unknown port:000003E8 irq:4
3: uart:unknown port:000002E8 irq:3
4: uart:16550A port:0000D000 irq:17 tx:0 rx:0 CTS|DSR
5: uart:unknown port:00000000 irq:0
6: uart:unknown port:00000000 irq:0
----------------------------------------------------------------
Is this disappearing act the chicken (cause of the problem), or the egg
(result of the problem)?!? Or maybe it has no meaning in the case of
the disappeared modem?
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https://bugs.launchpad.net/bugs/1087519
Title:
Serial port ttyS4 doesn't work in 12.04
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