Hello everybody, I have an old Typhoon DVB-S card which has the same cold boot problem as the KNC1 which Chris Dietrich reported about in November ( http://www.linuxtv.org/pipermail/linux-dvb/2005-November/005804.html ). Currently I am running a stock 2.6.14.2 kernel with dvb modules from CVS on a Debian system. lspci identifies my dvb card correctly: 0000:00:09.0 0480: 1131:7146 (rev 01) Subsystem: 1131:4f56 Flags: bus master, medium devsel, latency 64, IRQ 5 Memory at cfffde00 (32-bit, non-prefetchable) [size=512] After a cold boot (computer has to be switched off for longer than 2h) i2cdetect sees the card but cannot detect the tuner. i2c-2 unknown KNC1 DVB-S Algorithm unavailable i2c-1 unknown DC30[0] Algorithm unavailable i2c-0 unknown SiS96x SMBus adapter at 0x0c00 Algorithm unavailable ... 50: 50 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX 60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX 70: XX XX XX XX XX XX XX XX I have also tried the debian 2.6.12 kernel which Juergen Pfennig talked about. After a cold boot as defined above (> 2h off) it also fails. After a warm boot from kernel 2.4.27 with the Metzler driver i2cdetect sees the stv0299 at 0x68: ... 50: 50 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX 60: XX XX XX XX XX XX XX XX 68 XX XX XX XX XX XX XX 70: XX XX XX XX XX XX XX XX The explanation for my problem seems relatively straightforward. After a cold boot as defined above the stv0299 does not respond at the SAA7146_I2C_BUS_BIT_RATE_120 used by the current driver. When I use SAA7146_I2C_BUS_BIT_RATE_3200 as the Metzler driver does the frontend loads correctly but szap does not get a lock. I have also tried SAA7146_I2C_BUS_BIT_RATE_240 and SAA7146_I2C_BUS_BIT_RATE_480. With these the Typhoon cold boots correctly and works properly. It would be valuable to know wether this is a general problem of KNC1-S and old Typhoon-S cards or wether Chris and I have some odd problems. To find out wether my measure works replace SAA7146_I2C_BUS_BIT_RATE_120 in ../linux/drivers/media/dvb/ttpci/budget-core.c, line 384 by e.g. SAA7146_I2C_BUS_BIT_RATE_480 or apply attached patch. Regards Michael -------------- next part -------------- A non-text attachment was scrubbed... Name: typhoon-knc1-cold-boot.diff Type: text/x-diff Size: 4511 bytes Desc: not available Url : http://www.linuxtv.org/pipermail/linux-dvb/attachments/20051205/d6ef10e3/typhoon-knc1-cold-boot.bin
