On Sun, May 10, 2020 at 02:10:04PM +0700, Dio Putra wrote: > On 5/10/20 1:54 PM, Greg KH wrote: > > On Sun, May 10, 2020 at 01:48:24PM +0700, Dio Putra wrote: > >> On 5/10/20 12:47 PM, Greg KH wrote: > >>> On Sun, May 10, 2020 at 09:55:57AM +0700, Dio Putra wrote: > >>>> Hi, it's first time for me to report user-space breakage in here, so > >>>> i'm begging your pardon. > >>>> > >>>> I want to report that Linux 5.4 breaking my USB mount workflow due > >>>> udevadm monitor report here (I'm using vanilla kernel 5.4.39 on > >>>> Slackware64 Current and vanilla kernel 4.4.221 on Slackware64 14.2): > >>> > >>> <snip> > >>> > >>> Sorry, but what actually changed that you can see in the logs? > >> Sorry, what do you mean? The dmesg log or the kernel changelogs? > > > > Either, your message made them pretty impossible to compare with all of > > the line-wrapping :( > > > I'm so sorry for first message mess, because that message has been sent by > Gmail Website. Can I send my logs as attachment? I try to convenient everyone > here. ( FYI, I just switched to Thunderbird with these settings: > https://www.kernel.org/doc/html/v4.12/process/email-clients.html#thunderbird-gui ) Sure, attachments work, but better yet, if you can show the difference in a few lines that is much nicer than having to dig through large numbers of log files. > >>> What functionality broke? What used to work that no longer does work? > >>> > >> Yes, it supposed that just work and kernel could talk with udev, not just handled by the kernel. > > > > I don't understand, what functionality changed? What exactly used to > > work that no longer does? > linux-5.4 has been never called the udev dependencies whereas > linux-4.4 will call any udev dependencies if necessary, that's the problem. I do not understand what exactly you mean by "call udev dependencies". udev is used to create symlinks and set user/group permissions on device nodes in /dev/ which is created by devtmpfs. What exactly is not happening in your /dev/ with the move to a newer kernel? > > Did you change anything else other than the kernel on your system? Did > > you change to a newer version of udev/systemd or anything else? > > > I'm using eudev-master from their official mirror github: > https://github.com/gentoo/eudev Have you contacted the eudev developers to see if something different needs to be set in your kernel when moving 4 years in kernel development forward? Are you sure you have all the correct config options enabled? Why such a huge leap forward all at once, how about going from 4.4.y to 4.9.y and then 4.14.y and then 5.4.y? That might help narrow things down a bit easier. thanks, greg k-h
