Hi Ian, my last mail was incorrect. My currrently running kernel is 6.14.0 (6.14.0-37-generic #37~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 20 10:25:38 UTC 2 x86_64)
Regards. El 15/1/26 a les 12:27, Daniel Guerrero ha escrit: > > Hi Ian, > > I have tested the mainline kernels, and the problem seems to be > upstream, indeed. > > The last working version is 6.6.109. With this version the secondary > display syncs correctly and all video modes are available. 6.6.110 fails. > > Currently I'm running 6.18.1 (6.18.1-061801-generic #202512121839 SMP > PREEMPT_DYNAMIC Fri Dec 12 19:19:06 UTC 2025), and with this I have a > partial solution (laptop's HDMI works on boot, but losses whenever the > screen gets locked and then I need to re-plug it). > > Just for curiosity I tested the latest amd64 version available > (6.18.1), and it almost works. The external hub HDMI works during boot > (it doen't work with 6.6.109), but loses sync when the desktop starts. > Re-plugging the display fixes it. > > Just ask if I can help with anything else. > > > El 7/1/26 a les 0:48, Ian Whitfield ha escrit: >> Hi, thanks for reporting a kernel regression! >> >> Do you know the version of the LTS kernel which was last working? If you >> reinstall that older kernel and boot into it, does the issue go away? >> This would help us narrow down what patches to look at. >> >> Trying an upstream stable kernel would also tell us if the regression is >> on Ubuntu's side or upstream. Could you try to reproduce the problem >> with this mainline kernel:https://kernel.ubuntu.com/mainline/v6.6.119/ >> ? A guide to installing mainline kernel packages is available at >> https://wiki.ubuntu.com/Kernel/MainlineBuilds >> >> ** Changed in: linux (Ubuntu Noble) >> Assignee: (unassigned) => Ian Whitfield (ijwhitfield) >> > -- > <https://www.robsurgical.com> Daniel Guerrero Miralles > Software Team Lead > [email protected] > Aquest missatge pot contenir informació confidencial i/o privilegiada. > Si no sou el destinatari, si us plau informeu al remitent i elimineu > el missatge. > Este mensaje puede contener información confidencial y/o privilegiada. > Si no es el destinatario, por favor informe al remitente y elimine el > mensaje. > This message may contain confidential and/or privileged information. > If you are not the addressee, please notify the sender and delete the > message. -- <https://www.robsurgical.com> Daniel Guerrero Miralles Software Team Lead [email protected] Aquest missatge pot contenir informació confidencial i/o privilegiada. Si no sou el destinatari, si us plau informeu al remitent i elimineu el missatge. Este mensaje puede contener información confidencial y/o privilegiada. Si no es el destinatario, por favor informe al remitente y elimine el mensaje. This message may contain confidential and/or privileged information. If you are not the addressee, please notify the sender and delete the message. ** Attachment added: "wgRyuS9lbvv8tst8.png" https://bugs.launchpad.net/bugs/2136103/+attachment/5939236/+files/wgRyuS9lbvv8tst8.png ** Attachment added: "heoDNWGEUOH0J0PR.png" https://bugs.launchpad.net/bugs/2136103/+attachment/5939237/+files/heoDNWGEUOH0J0PR.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2136103 Title: [i915] Limited resolutions in monitors connected via USB hub when using 6.8.0-90.91-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2136103/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
