Public bug reported: Binary package hint: linux-source-2.6.24
I performed a clean installation of 8.04 and quickly noticed that the ACPI wakeup feature provided by /proc/acpi/alarm in Ubuntu 7.10 (with 2.6.22 kernel) is now deprecated and should be replaced by /sys/class/rtc/rtc0/wakealarm. However, I have nothing in the /sys/class/rtc directory, i.e. rtc0 was not detected. http://www.mythtv.org/wiki/index.php/ACPI_Wakeup says this: Warning: The wakealarm interface is incompatible with the kernel's old "Enhanced Real Time Clock Support" and "Generic /dev/rtc emulation" options. If your kernel was built with these enabled your kernel log will contain messages such as rtc_cmos: probe of 00:03 failed with error -16 The solution is to rebuild your kernel with the above two options excluded (find them under Drivers -> Character Devices) and the various RTC interfaces (found under Drivers -> Real Time Clock) included. From a .config point of view CONFIG_RTC and CONFIG_GEN_RTC must be unset and, at a minimum, RTC_INTF_SYSFS must be set. I don't see that probe failure on my PC but I have "/build/buildd/linux-2.6.24/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)". Taking a quick look at /boot/config-2.6.24-5-generic shows that I have incorrectly(?) CONFIG_RTC set even though CONFIG_RTC_INTF_SYSFS is also set. I will try to compile my own kernel and see if rtc0 is detected when CONFIG_RTC is unset. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- Regression: No replacement for /proc/acpi/alarm due to missing rtc0 https://bugs.launchpad.net/bugs/186297 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
