Today's 18.04 upgrade from 17.10, using 4k or 1080 monitor with display port or with HDMI for Radeon RX 460 booting until bios,then screen flashing with jumbled colors every few seconds, shutdown displays Ubuntu logo. Removing graphics card and using onboard HDMI for both is same as above, but shows Ubuntu loading animation, then no signal. Starting without monitor the plugging in 1080 shows attached picture between flashing
** Attachment added: "Screenshot_20180405-153332.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723619/+attachment/5103173/+files/Screenshot_20180405-153332.png -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1723619 Title: Ubuntu Desktop ISO fails to boot with nouveau on a displayport Status in Linux: Confirmed Status in Release Notes for Ubuntu: Fix Released Status in linux package in Ubuntu: Confirmed Bug description: On the latest daily artful image (/current as of 2017-10-14), the following occurs on a system with nVidia graphics (on my system, a GTX970) when connected to a 4k display over a displayport: https://photos.app.goo.gl/gLUva3Vgvtv0lAmj2 Steps to reproduce: - Download latest daily image, check checksums, burn to USB - Boot from USB. - Choose "Install Ubuntu" or "try ubuntu" at the menu. This happens on the livecd, but also upon ugrading the system from a previous daily with a different kernel: my "old" daily booted and installed fine with kernel 4.12.0-12, then failed with same error once dist-upgraded. On the faulty system I could test with, it seems to *only* happen over displayport/on a 4k screen (I don't own a non-4k displayport screen to test the 4k out). To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1723619/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
