On Sat, Dec 20, 2008 at 6:25 AM, Roshan Karki <roshan@xxxxxxxxxxxx> wrote: > Hello, > > I have tv-tuner with may laptop. I downloaded the source from > linuxtv.org and installed it. It asked for two files > dvb-usb-dib0700-1.20.fw and xc3028-v27.fw. which I copied from internet. > > I cant however scan for any channels. I have added dump_stack to > dib0700_core.c and here is the dmesg output. > > http://pastebin.com/d77534a37 > > snippet from irc > <roxan> devinheitmueller: does it look if my hardware is damaged? > <devinheitmueller> Well, the dib7000p demodulator is not answering the > very first i2c command it is sent, which usually means the chip is > totally non-functional. > > Please help. > -- > Regards, > Roshan Karki To elaborate on Roshan's situation (since I spent an hour debugging it this morning with him on #linuxtv), basically his problem is the dib7000p is not responding to even the i2c query for the vendor info (which is the first request sent to the chip). I suspect that perhaps the GPIOs are not setup properly and the chip is being held in reset. I had him rule out faulty hardware by having him boot into Windows and successfully perform a capture. Does anyone know who did the driver work for the "YUAN High-Tech STK7700PH" product? I will dig through the hg history if nobody speaks up... Also, there were some bugs in the dib0700 exception handling that made this harder to debug than it should have been. I will send Patrick some patches next week if I have time (I found three or four issues). Devin = Below is the dump_stack() results I had him add so we could see where the i2c error was coming from = [<f8c36afd>] dib0700_i2c_xfer+0x44d/0x470 [dvb_usb_dib0700] [<f8acb5c9>] i2c_transfer+0x69/0xa0 [i2c_core] [<f8bf7143>] dib7000p_read_word+0x63/0xc0 [dib7000p] [<f8bf7ebc>] dib7000p_identify+0x2c/0x130 [dib7000p] [<f8bf8088>] dib7000p_i2c_enumeration+0xc8/0x270 [dib7000p] [<f8c37609>] stk7700ph_frontend_attach+0x119/0x1c0 [dvb_usb_dib0700] [<f8bb207b>] dvb_usb_adapter_frontend_init+0x1b/0x100 [dvb_usb] [<f8bb1917>] dvb_usb_device_init+0x387/0x600 [dvb_usb] [<f8c36b75>] dib0700_probe+0x55/0x80 [dvb_usb_dib0700] [<f88df4e7>] usb_probe_interface+0xa7/0x140 [usbcore] [<c0201107>] ? sysfs_create_link+0x17/0x20 [<c02c3d4e>] really_probe+0xee/0x190 [<f88de8a9>] ? usb_match_id+0x49/0x60 [usbcore] [<c02c3e33>] driver_probe_device+0x43/0x60 [<c02c3ec9>] __driver_attach+0x79/0x80 [<c02c3593>] bus_for_each_dev+0x53/0x80 [<c02c3b6e>] driver_attach+0x1e/0x20 [<c02c3e50>] ? __driver_attach+0x0/0x80 [<c02c2f37>] bus_add_driver+0x1b7/0x230 [<c02c409e>] driver_register+0x6e/0x150 [<f88df7bc>] usb_register_driver+0x7c/0xf0 [usbcore] [<f8991000>] ? dib0700_module_init+0x0/0x55 [dvb_usb_dib0700] [<f8991000>] ? dib0700_module_init+0x0/0x55 [dvb_usb_dib0700] [<f8991035>] dib0700_module_init+0x35/0x55 [dvb_usb_dib0700] [<c0101120>] _stext+0x30/0x160 [<c014c604>] ? __blocking_notifier_call_chain+0x14/0x70 [<c015c208>] sys_init_module+0x88/0x1b0 [<c0103f7b>] sysenter_do_call+0x12/0x2f -- Devin J. Heitmueller http://www.devinheitmueller.com AIM: devinheitmueller _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
