** Description changed:
+ [Impact]
+
In the lunar release of linux-raspi, despite the boot configuration
enabling the i2c_arm parameter of the base overlay, the usual /dev/i2c-0
and /dev/i2c-1 devices are missing (they are present in jammy and
kinetic). These are the I2C interfaces present on the GPIO header (and
thus rather important on the raspi as without these interfaces being
present, I2C devices connected to the header cannot be used).
I'm guessing this is a kernel change, but it *might* be something in the
udev configuration; I haven't dug that far yet.
+
+ [Test Case]
+
+ Boot raspi and check presence of /dev/i2c-* device entries.
+
+ [Where Problems Could Occur]
+
+ Previous release had the i2c-dev driver compiled into the kernel. With
+ lunar we turned it into a module which turns out to be not great. So
+ change it back and restore the old behavior.
** Also affects: linux-raspi (Ubuntu Lunar)
Importance: Undecided
Status: New
** Changed in: linux-raspi (Ubuntu)
Status: Incomplete => Invalid
** Changed in: linux-raspi (Ubuntu Lunar)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2019320
Title:
i2c devices missing in lunar
Status in linux-raspi package in Ubuntu:
Invalid
Status in linux-raspi source package in Lunar:
Confirmed
Bug description:
[Impact]
In the lunar release of linux-raspi, despite the boot configuration
enabling the i2c_arm parameter of the base overlay, the usual
/dev/i2c-0 and /dev/i2c-1 devices are missing (they are present in
jammy and kinetic). These are the I2C interfaces present on the GPIO
header (and thus rather important on the raspi as without these
interfaces being present, I2C devices connected to the header cannot
be used).
I'm guessing this is a kernel change, but it *might* be something in
the udev configuration; I haven't dug that far yet.
[Test Case]
Boot raspi and check presence of /dev/i2c-* device entries.
[Where Problems Could Occur]
Previous release had the i2c-dev driver compiled into the kernel. With
lunar we turned it into a module which turns out to be not great. So
change it back and restore the old behavior.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2019320/+subscriptions
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