Your message dated Wed, 26 Jul 2017 09:43:35 +0200 with message-id <[email protected]> and subject line Re: util-linux: manual page incorrectly says that hwclock will use --directisa when nessecary has caused the Debian Bug report #450686, regarding util-linux: manual page incorrectly says that hwclock will use --directisa when nessecary to be marked as done.
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--- Begin Message ---Package: util-linux Version: 2.13-10 Severity: normal Due to a problem[1] with the kernel implementation of /dev/rtc on my laptop, hwclock cannot set the time here: root@chianamo:~# hwclock select() to /dev/rtc to wait for clock tick timed out However the --directisa option works: root@chianamo:~# hwclock --directisa Mon Nov 5 13:35:06 2007 -0.543591 seconds The manual page for hwclock says about --directisa: > This option tells hwclock to use explicit I/O instructions to access > the Hardware Clock. Without this option, hwclock will try to use > the /dev/rtc device (which it assumes to be driven by the rtc device > driver). If it is unable to open the device (for read), it will use > the explicit I/O instructions anyway. Obviously this is not true in all cases, since hwclock cannot set the time properly unless run with --directisa on my machine. Please fix either the manual page or hwclock (preferably hwclock should use directisa when /dev/rtc isn't available). 1. http://bugzilla.kernel.org/show_bug.cgi?id=7014 -- System Information: Debian Release: lenny/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: i386 (i686) Kernel: Linux 2.6.22-3-686 (SMP w/2 CPU cores) Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages util-linux depends on: ii libc6 2.6.1-6 GNU C Library: Shared libraries ii libncurses5 5.6+20071013-1 Shared libraries for terminal hand ii libselinux1 2.0.15-2+b1 SELinux shared libraries ii libslang2 2.0.7-5 The S-Lang programming library - r ii libuuid1 1.40.2-1 universally unique id library ii lsb-base 3.1-24 Linux Standard Base 3.1 init scrip ii tzdata 2007h-2 time zone and daylight-saving time ii zlib1g 1:1.2.3.3.dfsg-7 compression library - runtime -- bye, pabs http://wiki.debian.org/PaulWise
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--- Begin Message ---Version: 2.26.2-1 Hello! The hwclock(8) manpage has since v2.26 contained the following text which was introduced in commit 1afe0412e07cd20550cdd "hwclock: update man-page for directisa change": > As of v2.26 it will no longer automatically use directisa when > the rtc driver is unavailable; this was causing an unsafe condition that > could allow two processes to access the Hardware Clock at the same time. > Direct hardware access from userspace should only be used for testing, > troubleshooting, and as a last resort when all other methods fail. I'm thus closing this bug report, which I apparently missed doing earlier. Regards, Andreas Henriksson
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