On 5/10/20 2:32 PM, Greg KH wrote: > 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. > Okay, I'll attach long messages and trim it as far as I can. >>>>> 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? > Would I send my dmesg log with "udev.log-priority=debug" as attachment then? >>> 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? > It's my bad not to contact the eudev developers first. However I'm not quite sure to contact the eudev developers would solve the problem, but CMIIW. > 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. > Unfortunately I need to think twice due almost ran out of electricity here every time I power on my laptop for long time. So maybe I can't. But if these steps are necessary, I'll think solution later. > thanks, > > greg k-h >
