Thanks for the reply. Well, if I'm not getting any video I'm not sure how I could get SSH setup but I do have something interesting to report. When I boot the live DVD, leave the "set gfxpayload=keep" setting alone, and remove "quiet splash" from the kernel parameters, I can get the system to boot. How? I'm not sure. I wait for there to be no sound from the optical drive, which tells me the system has completed its internal boot process. Then I start pressing Ctrl-Alt-F1 through F12, trying to switch from X terminal sessions to a text-mode login session and eventually, I'll get a video signal, along with the desktop on the terminal I get from Ctrl-Alt-F7 (tty 7). So, perhaps I'm triggering something by doing this, I'm not sure.
However, I do have a dmesg log generated *without* specifying "nomodeset". Now, something else worth mentioning. I have the system setup to *not* boot in UEFI mode, because I had problems with Ubuntu 13.04 (my first Ubuntu release) booting in UEFI mode. So, I disabled secure boot and enabled the "Legacy CSM" and the system boots reliably from the hard drive. When I boot the Ubuntu 16.04 live DVD in non-UEFI mode, I never get a chance to specify the kernel parameters. When I boot the live DVD in UEFI mode, I get a chance to specify the kernel parameters. Thanks! ** Attachment added: "dmesg log from boot without "nomodeset" specified" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1598935/+attachment/4695585/+files/dmesg-3.log -- 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/1598935 Title: Ubuntu 16.04 won't properly boot due to radeon module issue Status in linux package in Ubuntu: Incomplete Bug description: When I boot an Ubuntu 16.04 live DVD on a Gateway system with an AMD A6-5400K APU, with an integrated Radeon HD 7540D graphics adapter, I get a black screen with no video image. If I look at "dmesg" output, I see these messages: ubuntu@ubuntu:~$ dmesg | grep "UMS" [ 4.827258] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! [ 39.561534] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! [ 76.905778] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! We currently run Ubuntu 14.04.2 on the system with no issue, including using the "radeon" video driver. WORKAROUND: Boot using kernel parameter: nomodeset ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-21-generic 4.4.0-21.37 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: ubuntu 2057 F.... pulseaudio /dev/snd/controlC0: ubuntu 2057 F.... pulseaudio /dev/snd/controlC1: ubuntu 2057 F.... pulseaudio CasperVersion: 1.376 Date: Mon Jul 4 20:08:04 2016 LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Gateway DX4380G ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/hostname.seed boot=casper quiet splash nomodeset --- PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.4.0-21-generic N/A linux-backports-modules-4.4.0-21-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/04/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P11-A1 dmi.board.name: DX4380G dmi.board.vendor: Gateway dmi.board.version: 1.02 dmi.chassis.type: 3 dmi.chassis.vendor: Gateway dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP11-A1:bd09/04/2012:svnGateway:pnDX4380G:pvr:rvnGateway:rnDX4380G:rvr1.02:cvnGateway:ct3:cvr: dmi.product.name: DX4380G dmi.sys.vendor: Gateway To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1598935/+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
