Добрый день. Имеется компьютер с Сom-портом. На компьютере установлена ubuntu 10.04, а также виндоус(ХР). В виндоусе ком-порт работает (посылались команды и приходили верные ответы от устройства),в диспетчере устройств com-порт ассоциируется с LPC Interface Controller.
Что происходит в ubuntu - ком-порты определяются,но операции записи-чтения не дают результата. Проверял : 1) утилитой minicom - не происходит ничего при инициализации 2) serial port terminal (gtkterm) из центра приложений Ubuntu - тоже черный экран и всё.
Важный момент - рядом стоит другой компьютер, с той же ubuntu, но совершенно другой конфигурацией самого компьютера - там все операции с com-портом проходили успешно (нуль-модемный кабель в слот одним концом, на другом соединить 2 и 3 контакт - как minicom, так и serial port terminal записывают и читают правильные байты. И с тем устройством ,к-ое в виндоус работало, здесь тоже проблем не возникло).
Результаты команд :
ядро:
[code]root@1:~# uname -a
Linux 1 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:10:02 UTC 2010 i686 GNU/Linux
[/code]
dmesg:
root@1:~# dmesg |grep tty
[ 0.000000] console [tty0] enabled
[ 0.540798] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 0.540941] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[ 0.541068] serial8250: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A
[ 0.541196] serial8250: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A
[ 0.541551] 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 0.541753] 00:07: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[ 0.541957] 00:08: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A
[ 0.542159] 00:09: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A
lspci :
root@1:~# lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation N10 Family DMI Bridge [8086:a000] (rev 02)
00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a001] (rev 02)
00:02.1 Display controller [0380]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a002] (rev 02)
00:19.0 Ethernet controller [0200]: Intel Corporation 82567V-3 Gigabit Network Connection [8086:1501] (rev 04)
00:1a.0 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 [8086:2834] (rev 04)
00:1a.1 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 [8086:2835] (rev 04)
00:1a.7 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 [8086:283a] (rev 04)
00:1b.0 Audio device [0403]: Intel Corporation 82801H (ICH8 Family) HD Audio Controller [8086:284b] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 [8086:283f] (rev 04)
00:1c.4 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 [8086:2847] (rev 04)
00:1d.0 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 [8086:2830] (rev 04)
00:1d.1 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 [8086:2831] (rev 04)
00:1d.2 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 [8086:2832] (rev 04)
00:1d.7 USB Controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 [8086:2836] (rev 04)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev f4)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller [8086:2815] (rev 04)
00:1f.1 IDE interface [0101]: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller [8086:2850] (rev 04)
00:1f.2 IDE interface [0101]: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA IDE Controller [8086:2828] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation 82801H (ICH8 Family) SMBus Controller [8086:283e] (rev 04)
03:00.0 Ethernet controller [0200]: Intel Corporation 82583V Gigabit Network Connection [8086:150c]
все права на чтение-запись на порты стоят, да и работа вся идет под рутом..
Интересный момент, рез-т dmidecode , COM-порта в списке нет, а на втором компьютере с Linuxом есть!
root@1:~# dmidecode
# dmidecode 2.9
SMBIOS 2.6 present.
17 structures occupying 945 bytes.
Table at 0x000FCBC0.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: American Megatrends Inc.
Version: 080016
Release Date: 03/18/2010
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 1024 kB
Characteristics:
ISA is supported
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
ESCD support is available
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 KB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
LS-120 boot is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Targeted content distribution is supported
BIOS Revision: 8.16
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: ICP / iEi
Product Name: SA09
Version: V1.0
Serial Number: To Be Filled By O.E.M.
UUID: 00020003-0004-0005-0006-000700080009
Wake-up Type: Power Switch
SKU Number: To Be Filled By O.E.M.
Family: To Be Filled By O.E.M.
Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
Manufacturer: ICP / iEi
Product Name: SA09
Version: V1.0
Serial Number: To be filled by O.E.M.
Asset Tag: To Be Filled By O.E.M.
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: To Be Filled By O.E.M.
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0
Handle 0x0003, DMI type 4, 42 bytes
Processor Information
Socket Designation: CPU 1
Type: Central Processor
Family: <OUT OF SPEC>
Manufacturer: Intel
ID: CA 06 01 00 FF FB EB BF
Version: Intel(R) Atom(TM) CPU D510 @ 1.66GHz
Voltage: 1.2 V
External Clock: 167 MHz
Max Speed: 1666 MHz
Current Speed: 1666 MHz
Status: Populated, Enabled
Upgrade: Socket LGA775
L1 Cache Handle: 0x0004
L2 Cache Handle: 0x0005
L3 Cache Handle: Not Provided
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Part Number: To Be Filled By O.E.M.
Core Count: 2
Core Enabled: 2
Thread Count: 4
Characteristics:
64-bit capable
Handle 0x0004, DMI type 7, 19 bytes
Cache Information
Socket Designation: L1-Cache
Configuration: Enabled, Not Socketed, Level 1
Operational Mode: Write Back
Location: Internal
Installed Size: 48 KB
Maximum Size: 48 KB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: Unknown
Error Correction Type: Parity
System Type: Data
Associativity: Other
Handle 0x0005, DMI type 7, 19 bytes
Cache Information
Socket Designation: L2-Cache
Configuration: Enabled, Not Socketed, Level 2
Operational Mode: Write Back
Location: Internal
Installed Size: 1024 KB
Maximum Size: 1024 KB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: Unknown
Error Correction Type: Single-bit ECC
System Type: Unified
Associativity: 8-way Set-associative
Handle 0x0006, DMI type 13, 22 bytes
BIOS Language Information
Installable Languages: 1
en|US|iso8859-1
Currently Installed Language: en|US|iso8859-1
Handle 0x0007, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 2 GB
Error Information Handle: Not Provided
Number Of Devices: 2
Handle 0x0008, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0007FFFFFFF
Range Size: 2 GB
Physical Array Handle: 0x0007
Partition Width: 0
Handle 0x0009, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0007
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: SODIMM
Set: None
Locator: DIMM0
Bank Locator: BANK0
Type: DDR2
Type Detail: Synchronous
Speed: 667 MHz (1.5 ns)
Manufacturer: Manufacturer00
Serial Number: SerNum00
Asset Tag: AssetTagNum0
Part Number: ModulePartNumber00
Handle 0x000A, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0007FFFFFFF
Range Size: 2 GB
Physical Device Handle: 0x0009
Memory Array Mapped Address Handle: 0x0008
Partition Row Position: 1
Interleaved Data Depth: 1
Handle 0x000B, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0007
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: BANK1
Type: Unknown
Type Detail: Unknown
Speed: Unknown
Manufacturer: Manufacturer01
Serial Number: SerNum01
Asset Tag: AssetTagNum1
Part Number: ModulePartNumber01
Handle 0x000C, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000000003FF
Range Size: 1 kB
Physical Device Handle: 0x000B
Memory Array Mapped Address Handle: 0x0008
Partition Row Position: 1
Interleaved Data Depth: 1
Handle 0x000D, DMI type 32, 20 bytes
System Boot Information
Status: No errors detected
Handle 0x000E, DMI type 41, 11 bytes
Unknown Type
Header and Data:
29 0B 0E 00 01 83 00 FF FF FF FF
Strings:
To Be Filled By O.E.M.
Handle 0x000F, DMI type 41, 11 bytes
Unknown Type
Header and Data:
29 0B 0F 00 01 04 00 FF FF FF FF
Strings:
To Be Filled By O.E.M.
Handle 0x0010, DMI type 127, 4 bytes
End Of Table
это навело на мысль, что возможно нет драйвера для интеловского LPC Controller (см. lspci).
Длительным поиском в гугле драйвера под Linux для данного устройства не нашел.
в linux kernel driver database данное устройство (8086:2815) упоминается лишь раз (модуль iTCO_wdt - но он исп. только для таймера, на всякий случай modprobe-ом подключил его - изменений не принесло в работу com-порта)
ВОзможно не там и не так искал..или действительно нет драйвера для данного устройства ...или проблема не в нём все-таки.
Заранее спасибо, надеюсь на помощь