Red Hat Bugzilla – Bug 913203
Load i2c-dev module when i2cdetect is executed
Last modified: 2017-03-30 11:50:53 EDT
Description of problem: i2cdetect requires the i2c-dev module be loaded so the appropriate /dev entries are created. This is not done automatically, so when i2cdetect is initially run it gives the false impression that no buses/devices exist: # i2cdetect -l # modprobe i2c-dev # i2cdetect -l i2c-0 i2c i915 gmbus ssc I2C adapter i2c-1 i2c i915 gmbus vga I2C adapter i2c-2 i2c i915 gmbus panel I2C adapter i2c-3 i2c i915 gmbus dpc I2C adapter i2c-4 i2c i915 gmbus dpb I2C adapter i2c-5 i2c i915 gmbus dpd I2C adapter i2c-6 i2c DPDDC-C I2C adapter i2c-7 i2c DPDDC-D I2C adapter Perhaps i2cdetect should do a blind module load? Or at a minimum complain if the device files don't exist (and tell the user to load it). Note, it does complain with some options - but doesn't indicate the solution of the missing module: # i2cdetect 0 Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory Version-Release number of selected component (if applicable): i2c-tools-3.1.0-2.fc18.x86_64 How reproducible: Every time. Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
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Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.
Created attachment 902419 [details] proposed patch for this issue
Attached is a patch solving this issue.
Created attachment 918644 [details] updated patch incorporated improvements proposed by Danielle Constantino
Still unfixed in Fedora 21
This message is a reminder that Fedora 20 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 20. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '20'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 20 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.
This bug is still present in Fedora 22, and likely in Fedora 23 too.
It seems that none of the tools from the i2c-tools package can work without the i2c-dev module and therefore we need to take care of the module auto-load. The easiest way how to achieve that is to put the i2c-dev module in the modules-load.d directory and call the modprobe in the %post, so that the module is loaded after the first package installation (I would skip it for updates). Hopefully it won't cause any harm when auto-loaded after each boot.
i2c-tools-3.1.0-15.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2015-f659daaf1a
i2c-tools-3.1.0-15.fc22 has been submitted as an update to Fedora 22. https://bodhi.fedoraproject.org/updates/FEDORA-2015-e794fee22b
i2c-tools-3.1.0-15.fc21 has been pushed to the Fedora 21 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with $ su -c 'dnf --enablerepo=updates-testing update i2c-tools' You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2015-b1c8d93987
i2c-tools-3.1.0-15.fc22 has been pushed to the Fedora 22 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with $ su -c 'dnf --enablerepo=updates-testing update i2c-tools' You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2015-e794fee22b
i2c-tools-3.1.0-15.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with $ su -c 'dnf --enablerepo=updates-testing update i2c-tools' You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2015-f659daaf1a
i2c-tools-3.1.0-15.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
i2c-tools-3.1.0-15.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
i2c-tools-3.1.0-15.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.