Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
On 06.01.22 18:09, pe...@easthope.ca wrote: From: Michael Biebl Date: Tue, 4 Jan 2022 19:12:04 +0100 Can you please provide the udev debug log from your mebius laptop? Certainly. From your message 27 I should first up the log-priority. udevadm control --log-priority=debug Then the udev daemon will report into /var/log/syslog. Records will be interspersed with other syslog records. I've checked udev.man and udevadm.man. No mention of a parameter specifying a log file. Can udev log to a dedicated file? That will be easier to comprehend than the full syslog. Thanks, ... P. udevadm control --log-priority=debug journalctl -f (and udevadm control --log-priority=info to set it back to sane levels) OpenPGP_signature Description: OpenPGP digital signature
Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
From: Michael Biebl Date: Tue, 4 Jan 2022 19:12:04 +0100 > Can you please provide the udev debug log from your mebius laptop? Certainly. From your message 27 I should first up the log-priority. udevadm control --log-priority=debug Then the udev daemon will report into /var/log/syslog. Records will be interspersed with other syslog records. I've checked udev.man and udevadm.man. No mention of a parameter specifying a log file. Can udev log to a dedicated file? That will be easier to comprehend than the full syslog. Thanks, ... P. -- mobile: +1 778 951 5147 VoIP: +1 604 670 0140 48.7693 N 123.3053 W
Bug#1002850: Re (2): Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
On 30.12.21 17:47, Michael Biebl wrote: What the debug output of systemd-udevd when you attach the device? This command will allow one to observe the execution of rules: udevadm control --log-priority=debug journalctl -f (and udevadm control --log-priority=info to set it back to sane levels) Can you please provide the udev debug log from your mebius laptop? OpenPGP_signature Description: OpenPGP digital signature
Bug#1002850: Re (2): Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
On 30.12.21 16:47, pe...@easthope.ca wrote:
Hello Michael,
From: Michael Biebl
Date: Thu, 30 Dec 2021 08:43:32 +0100
What procedures?
In essence I followed the procedure to attach a SYMLINK name to the
SDHC card as described here. https://wiki.debian.org/udev
The salient step is to make an effective udev rule. More details are
in the message at debian-user, linked in the preceeding message 10.
I'm not going to extract the information from debian-user. Those should
be provided by you in the bug report.
The result is these two different rules; each being effective in the
desktop system.
KERNEL=="sd?1", ATTR{size}=="7434240", SYMLINK+="GRNSD", \
OWNER="peter", GROUP="users"
KERNEL=="sd?1", ENV{ID_SERIAL_SHORT}=="0201202010201000", SYMLINK+="GRNSD", \
OWNER="peter", GROUP="peter"
Neither of these produces the SYMLINK in Debian 11 on the Sharp Mebius.
What's the actual device name?
Please post the output of
udevadm info -a /dev/
and
udevadm info /dev/
What the debug output of systemd-udevd when you attach the device?
This command will allow one to observe the execution of rules:
udevadm control --log-priority=debug
journalctl -f
(and udevadm control --log-priority=info to set it back to sane levels)
OpenPGP_signature
Description: OpenPGP digital signature
Bug#1002850: Re (2): Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
Hello Michael,
From: Michael Biebl
Date: Thu, 30 Dec 2021 08:43:32 +0100
> What procedures?
In essence I followed the procedure to attach a SYMLINK name to the
SDHC card as described here. https://wiki.debian.org/udev
The salient step is to make an effective udev rule. More details are
in the message at debian-user, linked in the preceeding message 10.
The result is these two different rules; each being effective in the
desktop system.
KERNEL=="sd?1", ATTR{size}=="7434240", SYMLINK+="GRNSD", \
OWNER="peter", GROUP="users"
KERNEL=="sd?1", ENV{ID_SERIAL_SHORT}=="0201202010201000", SYMLINK+="GRNSD", \
OWNER="peter", GROUP="peter"
Neither of these produces the SYMLINK in Debian 11 on the Sharp Mebius.
> What symlink? Please be more specific.
> Have you created custom udev rules or what?
Yes, certainly the rules above were defined in the systems. Described
in detail in the message to debian-user. Here is the link again.
https://lists.debian.org/debian-user/2021/12/msg00937.html
The SYMLINK name "GRNSD", is visible in each rule above. The
essential concept is that 'KERNEL=="sd?1", ATTR{size}=="7434240"' in
the first rule and
'KERNEL=="sd?1", ENV{ID_SERIAL_SHORT}=="0201202010201000"' in the
second rule identify the SDHC. Then 'SYMLINK+="GRNSD"' connects the
name to the device. Note that each rule should accomplish the same
result. Only one rule should be required. The rule using SERIAL
avoids the risk of ambiguity in the unlikely case of two devices
containing parts exactly the same size. That is 7434240 byte parts.
In Debian 11 on the generic desktop machine, all works as expected.
Neither rule produces the symlink in Debian 11 on the Sharp Mebius.
For background, I've used rules containing ATTR{size} in various
desktop and laptop machines through several Debian releases.
According to Wikipedia, the initial release of udev was in 2003. In
Debian I guess udev first appeared after Woody, Debian 3. I don't
recall specifically but I've used udev successfully for about a
decade. This is the first instance of failure.
Before submitting the message to debian-user I had hoped that others
might have noticed a related problem. Apparently not. Therefore the
next step should be a debug procedure. Maybe you have an idea or tip
before I try debugging. =8~)
Thanks,... Peter E.
--
mobile: +1 778 951 5147
VoIP: +1 604 670 0140
48.7693 N 123.3053 W
Bug#1002850: udev fails to create a symlink for a SDHC card connected to a Sharp Mebius laptop.
Control: tags -1 + moreinfo On 30.12.21 03:10, pe...@easthope.ca wrote: * What led up to the situation? Attempted to use a SDHC card in a Sharp Mebius PC-CB1-M1. * What exactly did you do (or not do) that was effective (or ineffective)? Attempted to use a SDHC card in a Sharp Mebius PC-CB1-M1. Followed the same procedure as used with previous Debians and in Debian 11 on other machines. What procedures? * What was the outcome of this action? The symlink was not created as in other cases. What symlink? Please be more specific. Have you created custom udev rules or what? OpenPGP_signature Description: OpenPGP digital signature
