On Tue, Dec 07, 2010 at 12:07:53PM -0700, Mark Zimmerman wrote: > Greetings: > > I have a DViCO FusionHDTV7 Dual Express card that works with 2.6.35 but > which fails to initialize with the latest 2.6.36 kernel. The firmware > fails to load due to an i2c failure. A search of the archives indicates > that this is not the first time this issue has occurred. > > What can I do to help get this problem fixed? > > Here is the dmesg from 2.6.35, for the two tuners: > > xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)... > xc5000: firmware read 12401 bytes. > xc5000: firmware uploading... > xc5000: firmware upload complete... > xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)... > xc5000: firmware read 12401 bytes. > xc5000: firmware uploading... > xc5000: firmware upload complete.. > > and here is what happens with 2.6.36: > > xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)... > xc5000: firmware read 12401 bytes. > xc5000: firmware uploading... > xc5000: I2C write failed (len=3) > xc5000: firmware upload complete... > xc5000: Unable to initialise tuner > xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)... > xc5000: firmware read 12401 bytes. > xc5000: firmware uploading... > xc5000: I2C write failed (len=3) > xc5000: firmware upload complete... > More information about this: I tried 2.6.37 (vanilla source from kernel.org) and the problem persisted. So, I enabled these options: CONFIG_I2C_DEBUG_CORE=y CONFIG_I2C_DEBUG_ALGO=y CONFIG_I2C_DEBUG_BUS=y hoping to get more information but this time the firmware loaded successfully and the tuner works properly. This leads me to suspect a race condition somewhere, or maybe a tunable parameter that can be adjusted. The fact that the 'write failed' message occurs before the 'upload complete' message would tend to support this. Can anyone suggest something I might try? -- Mark -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
