Portál AbcLinuxu, 8. května 2025 22:54
Mar 5 22:34:15 localhost kernel: usb 1-1: new full speed USB device using ohci_hcd and address 2 Mar 5 22:34:15 localhost kernel: cdc_acm 1-1:1.0: ttyACM0: USB ACM device Mar 5 22:34:15 localhost udev[2276]: creating device node '/udev/ttyACM0' Mar 5 22:34:31 localhost kernel: CSLIP: code copyright 1989 Regents of the University of California Mar 5 22:34:31 localhost kernel: PPP generic driver version 2.4.2 Mar 5 22:34:31 localhost pppd[2297]: pppd 2.4.1 started by root, uid 0 Mar 5 22:34:31 localhost udev[2300]: creating device node '/udev/ppp' Mar 5 22:34:32 localhost pppd[2297]: Serial connection established. Mar 5 22:34:33 localhost pppd[2297]: Using interface ppp0 Mar 5 22:34:33 localhost pppd[2297]: Connect: ppp0 <--> /dev/ttyACM0 Mar 5 22:34:37 localhost pppd[2297]: Remote message: ok Mar 5 22:34:37 localhost kernel: PPP BSD Compression module registered Mar 5 22:34:38 localhost pppd[2297]: local IP address 10.166.239.2 Mar 5 22:34:38 localhost pppd[2297]: remote IP address 10.164.4.6 Mar 5 22:34:38 localhost pppd[2297]: primary DNS address 160.218.10.200 Mar 5 22:34:38 localhost pppd[2297]: secondary DNS address 160.218.43.200Problem je v tom, ze modem v ruzne dlouhych intervalech resetuje USB (zjistl jsem ze to je evivalentni k vysunuti a zanuti USB konetoru od modemu):
Mar 5 22:34:49 localhost kernel: usb 1-1: USB disconnect, address 2 Mar 5 22:34:49 localhost pppd[2297]: Hangup (SIGHUP) Mar 5 22:34:49 localhost pppd[2297]: Modem hangup Mar 5 22:34:49 localhost pppd[2297]: Connection terminated. Mar 5 22:34:49 localhost pppd[2297]: Connect time 0.3 minutes. Mar 5 22:34:49 localhost pppd[2297]: Sent 14568 bytes, received 486225 bytes.Po tomto resetu to na kozoli a do logu vyhodi:
Mar 5 22:34:49 localhost kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Mar 5 22:34:49 localhost kernel: printing eip: Mar 5 22:34:49 localhost kernel: c019b751 Mar 5 22:34:49 localhost kernel: *pde = 00000000 Mar 5 22:34:49 localhost kernel: Oops: 0000 [#1] Mar 5 22:34:49 localhost kernel: Modules linked in: bsd_comp ppp_async crc_ccitt ppp_generic slhc iptable_mangle ipt_REDIRECT ipt_MASQUERADE iptable_nat ip_conntrack ip_tables af_packet floppy 8139too mii cdc_acm ohci_hcd usbcore genrtc ext3 jbd Mar 5 22:34:49 localhost kernel: CPU: 0 Mar 5 22:34:49 localhost kernel: EIP: 0060:[c019b751] Not tainted VLI Mar 5 22:34:49 localhost kernel: EFLAGS: 00010246 (2.6.10) Mar 5 22:34:49 localhost kernel: EIP is at get_kobj_path_length+0x19/0x34 Mar 5 22:34:49 localhost kernel: eax: 00000000 ebx: 00000000 ecx: ffffffff edx: c4b7b0d8 Mar 5 22:34:49 localhost kernel: esi: 00000001 edi: 00000000 ebp: c20d7d7c esp: c20d7d70 Mar 5 22:34:49 localhost kernel: ds: 007b es: 007b ss: 0068 Mar 5 22:34:49 localhost kernel: Process pppd (pid: 2297, threadinfo=c20d6000 task=c20b1580) Mar 5 22:34:49 localhost kernel: Stack: 000000d0 c4b7b0b4 c031f94c c20d7d94 c019b7ca c4b7b0d8 c40e0278 c4b7b0b4 Mar 5 22:34:49 localhost kernel: c031f94c c20d7dc8 c01ef483 c4b7b0d8 000000d0 c37fd053 c40e0260 c031f94c Mar 5 22:34:49 localhost kernel: c20d7dd8 c20d7dc8 00000000 c40e086c 00000000 00000000 c20d7e1c c019c307 Mar 5 22:34:49 localhost kernel: Call Trace: Mar 5 22:34:49 localhost kernel: [c0102703] show_stack+0x83/0x90 Mar 5 22:34:49 localhost kernel: [c0102842] show_registers+0x112/0x184 Mar 5 22:34:49 localhost kernel: [c0102a02] die+0xc6/0x140 Mar 5 22:34:49 localhost kernel: [c010db03] do_page_fault+0x48f/0x60b Mar 5 22:34:49 localhost kernel: [c010235b] error_code+0x2b/0x30 Mar 5 22:34:49 localhost kernel: [c019b7ca] kobject_get_path+0x12/0x5c Mar 5 22:34:49 localhost kernel: [c01ef483] class_hotplug+0x43/0x120 Mar 5 22:34:49 localhost kernel: [c019c307] kobject_hotplug+0x1c3/0x250 Mar 5 22:34:49 localhost kernel: [c019bae3] kobject_del+0xf/0x24 Mar 5 22:34:49 localhost kernel: [c01ef876] class_device_del+0x9a/0xb4 Mar 5 22:34:49 localhost kernel: [c01ef89d] class_device_unregister+0xd/0x1c Mar 5 22:34:49 localhost kernel: [c01efd70] class_simple_device_remove+0x60/0x70 Mar 5 22:34:49 localhost kernel: [c01d7388] tty_unregister_device+0x30/0x3c Mar 5 22:34:49 localhost kernel: [c6822442] acm_tty_close+0x9a/0xe4 [cdc_acm] Mar 5 22:34:49 localhost kernel: [c01d5898] release_dev+0x230/0x688 Mar 5 22:34:49 localhost kernel: [c01d60d8] tty_release+0xc/0x18 Mar 5 22:34:49 localhost kernel: [c014201b] __fput+0x4f/0xf0 Mar 5 22:34:49 localhost kernel: [c0141fc6] fput+0x16/0x1c Mar 5 22:34:49 localhost kernel: [c0140dcf] filp_close+0x63/0x70 Mar 5 22:34:49 localhost kernel: [c0140e27] sys_close+0x4b/0x60 Mar 5 22:34:49 localhost kernel: [c01020f7] syscall_call+0x7/0xb Mar 5 22:34:49 localhost kernel: Code: ff 83 c4 04 8d 65 f8 89 d8 5b 5e 89 ec 5d c3 8d 76 00 55 89 e5 57 56 53 be 01 00 00 00 31 db 8b 55 08 8b 3a b9 ff ff ff ff 89 d8 f2 ae f7 d1 49 8b 52 24 8d 74 31 01 85 d2 75 e7 89 f0 5b 5e 5fPak se vytvori nove zarizeni, tentokrat ale /udev/ttyACM1 a i kdyz ttyACM0 tim padem uz neni aktivni stale ale existuje v /udev/ttyACM0
Mar 5 22:34:52 localhost kernel: <6>usb 1-1: new full speed USB device using ohci_hcd and address 3 Mar 5 22:34:52 localhost kernel: cdc_acm 1-1:1.0: ttyACM1: USB ACM device Mar 5 22:34:52 localhost udev[2374]: creating device node '/udev/ttyACM1' Mar 5 22:35:07 localhost pppd[2378]: pppd 2.4.1 started by root, uid 0no a to je vsechno, dal uz pppd do logu nic nehlasi, pokud dam pppd vytoci znova tak:
Mar 5 22:35:58 localhost pppd[2412]: pppd 2.4.1 started by root, uid 0 Mar 5 22:35:58 localhost pppd[2412]: Device ttyACM1 is locked by pid 2378 Mar 5 22:35:58 localhost pppd[2412]: Exit.tzn. ze pppd to zarizeni echce pustit a i kdyz dam killall pppd tak se pppd stejne nechce ukoncit.. Nejde o nejak udelat tak, aby se to zarizeni vubec pri resetu nemenilo popr. to vyresit jinak?
takze v gentoo je to takhle (pro muj mobylni modem):
do souboru /etc/udev/rules.d/10-local.rules date radek BUS="usb" SYSFS{idProduct}="XXXX" SYSFS{idVendor}="YYYY" name="%k" SYMLINK="moudem", kde XXXX a YYYY jsou prislusne identifikatory z /sys/....... Potom pppd nakonfigurujete tak, aby jako device pouzival /dev/modem.
enjoy ;)
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