Regression: No replacement for /proc/acpi/alarm due to missing rtc0
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Colin Ian King |
Bug Description
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/
http://
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/
Changed in linux: | |
assignee: | nobody → ubuntu-kernel-team |
importance: | Undecided → Medium |
status: | New → Triaged |
Changed in linux: | |
status: | In Progress → Fix Committed |
Changed in linux: | |
status: | Fix Committed → In Progress |
Changed in linux: | |
status: | In Progress → Fix Committed |
Linux n71 2.6.24-5-generic #1 SMP Thu Jan 24 19:29:14 UTC 2008 x86_64 GNU/Linux