All, Here is the test code. It's butt ugly, but does the job and it's short. You need a satellite tuner and need to edit the dvbBug.c file to put two frequencies you have on your dish. Last run, it crashed the ARM in 7516 iterations. So it may take some time. Is it possible it's a firmware bug? If yes, who is developping it? Do we have the source code? Thanks > -----Original Message----- > From: linux-dvb-bounce@linuxtv.org > [mailto:linux-dvb-bounce@linuxtv.org]On Behalf Of Valsecchi Patrick > Sent: Friday, April 02, 2004 12:02 PM > To: linux-dvb@linuxtv.org > Subject: [linux-dvb] stability problems + closing and re-opening the > frontend > > > Hi all, > > I'm trying to nail down a stability problem with the DVB > drivers. My application is basically scanning all the > frequencies (get them from the NIT) in loop. For each > frequency, it tunes to it, setup a few filters, gather some > data, check it and close the filters. After a few frequency > (an average of around 100) changes, I get nasty messages like > that from my kernel (dmesg): > av7110_send_fw_cmd error > av7110_fw_cmd error > __av7110_send_fw_cmd: timeout waiting for COMMAND idle > av7110_fw_request error > StartHWFilter error > av71100: ARM crashed! > av7110_fw_cmd error > av7110_fw_cmd error > > The tunning and the setup of the filters doesn't return any > error, but I don't get any data out of them anymore. My > application timeouts and goes to the next frequency, but that > doesn't help, same problem. The noise ratio is lower that > usual, so I guess it's a bad tunning. > > Sometimes restarting my application is enough to fix, some > other times "rmmod dvb_ttpci; modprobe dvb_ttpci" helps, but > sometimes I have to reboot to have my DVB card works again. > > I thought it was a problem with the frontend (I open it when > the application starts and keep it open), so I tried to close > the frontend and re-open it before each tune. Seems like once > you closed the frontend, you cannot re-open it anymore. I get > "ressource busy" message when calling open, even if I put a > "sleep(2)" between the close and the open. I checked using > /proc/.../fd and everything is closed at that moment (even > the filters). I kill my process and start it again and > everything works again. > > Now my questions: > 1) Do you guys have any idea on how to avoid "av71100: ARM > crashed!"? I'm going to write a small piece of code that > reproduces that so I can give it to you. > 2) What is the problem with closing the frontend and > re-opening it again from the same process? > > I'm using the DVB drivers from an un-patched 2.6.4 kernel (no > CVS access) on a Debian "testing". The loaded modules are: > Module Size Used by > dvb_ttpci 84844 0 > stv0299 12548 0 > dvb_core 61972 2 dvb_ttpci,stv0299 > saa7146_vv 51680 1 dvb_ttpci > saa7146 19172 2 dvb_ttpci,saa7146_vv > v4l1_compat 14276 1 saa7146_vv > v4l2_common 6144 1 saa7146_vv > videodev 9696 1 saa7146_vv > firmware_class 10112 1 dvb_ttpci > ttpci_eeprom 2816 1 dvb_ttpci > snd 55076 0 > soundcore 9856 1 snd > ohci_hcd 19620 0 > ehci_hcd 26948 0 > matroxfb_base 31160 0 > matroxfb_DAC1064 11616 1 matroxfb_base > matroxfb_accel 5184 1 matroxfb_base > cfbcopyarea 4064 1 matroxfb_accel > cfbimgblt 3136 1 matroxfb_accel > cfbfillrect 3904 1 matroxfb_accel > matroxfb_g450 7904 1 matroxfb_base > g450_pll 7104 2 matroxfb_DAC1064,matroxfb_g450 > matroxfb_misc 9984 4 > matroxfb_base,matroxfb_DAC1064,matroxfb_g450,g450_pll > video_buf 21124 1 saa7146_vv > uhci_hcd 32752 0 > usbcore 106076 5 ohci_hcd,ehci_hcd,uhci_hcd > joydev 10048 0 > evdev 9248 0 > sr_mod 16036 0 > cdrom 38976 1 sr_mod > ide_scsi 15172 0 > parport_pc 38752 1 > lp 11172 0 > parport 42504 2 parport_pc,lp > > dvb_ttcpi is started with the option "hw_sections=0" the rest > uses the default. I need software filtering because I need > more than 8 filters and the ARM was crashing at 9 filters in > hardware filtering mode. > > Thanks for your help. > > --- > -°) Patrick Valsecchi > /\\ > _\_v > > > -- > Info: > To unsubscribe send a mail to ecartis@linuxtv.org with > "unsubscribe linux-dvb" as subject. > >
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dvbBug.tar.gz
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