Re: [asterisk-users] dahdi_dummy: Unable to register DAHDI rtc driver
On Wed, Apr 8, 2009 at 10:23 AM, Shaun Ruffell sruff...@digium.com wrote: David Backeberg wrote: Hello there: I think I have a silly kernel configuration problem. I'm running: * vanilla 2.6.27.10 kernel built from source * dahdi-2.1.0.4 built from source So far so good, dahdi module loads just fine: dahdi: Telephony Interface Registered on major 196 dahdi: Version: 2.1.0.4 when I try to: hal04 dahdi # modprobe dahdi_dummy FATAL: Error inserting dahdi_dummy (/lib/modules/2.6.27.10/dahdi/dahdi_dummy.ko): Input/output error kernel messages gives me: dahdi_dummy: Unable to register DAHDI rtc driver There is a kernel config parameter called CONFIG_HPET_EMULATE_RTC, that if defined in the kernel config, will cause the behavior that you're seeing. I have not looked to see at which version that option came in. However, I think support for RTC in dahdi_dummy is best dropped. There is a patch on mantis (http://bugs.digium.com/view.php?id=13930) against dahdi_dummy that allows it to provide accurate timing with standard kernel timers that you may want to try. I applied the patch on Bug 13930, tested it out and it has been a great success. I now see that the Bug has been closed and the patch has been added to DAHDI trunk. Hooray! As a piece of documentation, I now get a different report from dahdi_tool when using dahdi_dummy. dahdi_tool used to report that the source was RTC. Now the source is Linux26. The dahdi_test -c 20 results were much more consistent with Bug 13930's patch than when using RTC as the timing source using my 2.6.25.9 kernel. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] dahdi_dummy: Unable to register DAHDI rtc driver
David Backeberg wrote: Hello there: I think I have a silly kernel configuration problem. I'm running: * vanilla 2.6.27.10 kernel built from source * dahdi-2.1.0.4 built from source So far so good, dahdi module loads just fine: dahdi: Telephony Interface Registered on major 196 dahdi: Version: 2.1.0.4 when I try to: hal04 dahdi # modprobe dahdi_dummy FATAL: Error inserting dahdi_dummy (/lib/modules/2.6.27.10/dahdi/dahdi_dummy.ko): Input/output error kernel messages gives me: dahdi_dummy: Unable to register DAHDI rtc driver I'm probably doing something silly here. Then I was curious, so I backed up to a 2.6.25.9 kernel I already had, and dahdi_dummy loaded just fine: dahdi_dummy: RTC rate is 1024 Does anybody know whether: * something changed in mainline kernel that breaks dahdi * there was a new kernel parameter that I should have set differently? There is a kernel config parameter called CONFIG_HPET_EMULATE_RTC, that if defined in the kernel config, will cause the behavior that you're seeing. I have not looked to see at which version that option came in. However, I think support for RTC in dahdi_dummy is best dropped. There is a patch on mantis (http://bugs.digium.com/view.php?id=13930) against dahdi_dummy that allows it to provide accurate timing with standard kernel timers that you may want to try. Cheers, -- Shaun Ruffell Digium, Inc. | Linux Kernel Developer 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at: www.digium.com www.asterisk.org ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] dahdi_dummy: Unable to register DAHDI rtc driver
Hello there: I think I have a silly kernel configuration problem. I'm running: * vanilla 2.6.27.10 kernel built from source * dahdi-2.1.0.4 built from source So far so good, dahdi module loads just fine: dahdi: Telephony Interface Registered on major 196 dahdi: Version: 2.1.0.4 when I try to: hal04 dahdi # modprobe dahdi_dummy FATAL: Error inserting dahdi_dummy (/lib/modules/2.6.27.10/dahdi/dahdi_dummy.ko): Input/output error kernel messages gives me: dahdi_dummy: Unable to register DAHDI rtc driver I'm probably doing something silly here. Then I was curious, so I backed up to a 2.6.25.9 kernel I already had, and dahdi_dummy loaded just fine: dahdi_dummy: RTC rate is 1024 Does anybody know whether: * something changed in mainline kernel that breaks dahdi * there was a new kernel parameter that I should have set differently? No emergency, more like an observation. I'm just backing off kernel version for now. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
