Hello, I found a problem with the oti6858 usbserial driver. Sometimes something goes wrong and I lost completly the console access. I can type chars in a application like firefox but not in any console window (xterm or real tty). ssh login succeedes partly but I dont get a prompt in this case. After examining the syslog I found that: ----- syslog begin ------ Sep 24 09:27:48 develop kernel: usbcore: deregistering interface driver oti6858 Sep 24 09:27:48 develop kernel: ------------[ cut here ]------------ Sep 24 09:27:48 develop kernel: WARNING: at kernel/workqueue.c:368 flush_cpu_workqueue+0x68/0x6a() Sep 24 09:27:48 develop kernel: Hardware name: MP061 Sep 24 09:27:48 develop kernel: Modules linked in: oti6858(-) nvidia(P) binfmt_misc ppdev lp parport rfcomm l2cap bluetooth tun vboxnetadp vboxnetflt vboxdrv pppol2tp pppox ppp_generic slhc ipv6 capifs acpi_cpufreq cpufreq_ondemand cpufr eq_powersave cpufreq_stats freq_table cpufreq_userspace cpufreq_conservative nfsd nfs lockd fscache nfs_acl auth_rpcgss sunrpc deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic cbc aes_i586 aes_g eneric xcbc rmd160 sha256_generic sha1_generic crypto_null af_key nls_iso8859_1 nls_cp437 vfat fat fuse dm_snapshot dm_mirror dm_region_hash dm_log coretemp loop pl2303 snd_hda_codec_idt usbhid snd_hda_intel hid snd_hda_codec snd_hwdep s nd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy arc4 snd_seq_oss ecb snd_seq_midi snd_rawmidi iwl3945 snd_seq_midi_event usbserial dm9601 snd_seq iwlcore sdhci_pci firewire_ohci usb_storage asix usbnet snd_timer sdhci snd_seq_device intel _agp rtc_cmos b44 mmc_core firewire_core mac80211 snd crc_itu_t agpgart iTCO_wdt iTCO_vendor_support rtc_core rtc_lib ssb ohci1394 soundcore snd_page_alloc joydev led_class pcmcia pcmcia_core mii ieee1394 ricoh_mmc button battery ac vide o processor cfg80211 sg i2c_i801 i2c_core uhci_hcd ehci_hcd evdev usbcore psmouse wmi dell_laptop sr_mod serio_raw output cdrom rfkill dm_mod thermal fan ide_pci_generic Sep 24 09:27:48 develop kernel: Pid: 7, comm: events/0 Tainted: P R 2.6.31 #1 Sep 24 09:27:48 develop kernel: Call Trace: Sep 24 09:27:48 develop kernel: [<c133a780>] ? printk+0x18/0x20 Sep 24 09:27:48 develop kernel: [<c1042fe4>] ? flush_cpu_workqueue+0x68/0x6a Sep 24 09:27:48 develop kernel: [<c1032761>] warn_slowpath_common+0x66/0xae Sep 24 09:27:48 develop kernel: [<c1042fe4>] ? flush_cpu_workqueue+0x68/0x6a Sep 24 09:27:48 develop kernel: [<c10327be>] warn_slowpath_null+0x15/0x17 Sep 24 09:27:48 develop kernel: [<c1042fe4>] flush_cpu_workqueue+0x68/0x6a Sep 24 09:27:48 develop kernel: [<c10290e1>] ? default_wake_function+0xb/0xd Sep 24 09:27:48 develop kernel: [<c103bf43>] ? lock_timer_base+0x1f/0x40 Sep 24 09:27:48 develop kernel: [<c10431be>] flush_workqueue+0x2e/0x4c Sep 24 09:27:48 develop kernel: [<c10431e9>] flush_scheduled_work+0xd/0xf Sep 24 09:27:48 develop kernel: [<f805bf96>] oti6858_close+0x74/0x10a [oti6858] Sep 24 09:27:48 develop kernel: [<f8a777d9>] serial_do_down+0x33/0x3f [usbserial] Sep 24 09:27:48 develop kernel: [<f8a777f6>] serial_hangup+0x11/0x1c [usbserial] Sep 24 09:27:48 develop kernel: [<c1232568>] do_tty_hangup+0xbf/0x325 Sep 24 09:27:48 develop kernel: [<c10429c2>] worker_thread+0x153/0x22c Sep 24 09:27:48 develop kernel: [<c1023141>] ? __wake_up_common+0x3f/0x63 Sep 24 09:27:48 develop kernel: [<c12324a9>] ? do_tty_hangup+0x0/0x325 Sep 24 09:27:48 develop kernel: [<c1046baf>] ? autoremove_wake_function+0x0/0x3a Sep 24 09:27:48 develop kernel: [<c104286f>] ? worker_thread+0x0/0x22c Sep 24 09:27:48 develop kernel: [<c1046896>] kthread+0x74/0x76 Sep 24 09:27:48 develop kernel: [<c1046822>] ? kthread+0x0/0x76 Sep 24 09:27:48 develop kernel: [<c1004127>] kernel_thread_helper+0x7/0x10 Sep 24 09:27:48 develop kernel: ---[ end trace ca500da836b73c70 ]--- Sep 24 09:27:48 develop kernel: oti6858 ttyUSB1: oti6858 converter now disconnected from ttyUSB1 Sep 24 09:27:48 develop kernel: oti6858 4-1:1.0: device disconnected Sep 24 09:27:48 develop kernel: USB Serial deregistering driver oti6858 Sep 24 09:27:49 develop chipcardd[28322]: devicemanager.c: 3356: Changes in hardware list ----- syslog end ------ I think this should fixed. I'm not an basic user and can test a lot and find a way to help me but its very nasty to do a hard shutdown (system hangs on reboot). With best regards Christoph -- Linux User Group Wernigerode http://www.lug-wr.de/
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