okay turned back the clock .. to a spinning metal disk previously installed in this hardware .. ran a number of test installs all work fine .. cosmic/bionic/disco early version disco final all work boot normally .. always ..
thus conclusion is a SSD is very fast and can respond to requests sooner than a spinning metal disk this throws off the timing of a number of boot processes .. which become out of sync.. due to the " slower processor " now the first boot into a fresh install is not effected as a very extended plymouth start occurs .. due to " automatic-updates?? or disk checks or something ?" the rest of the boots are too fast for even plymouth to load properly due to a not yet loaded kernel video module .. thus it only flashes the screen red briefly .. then xorg/lightdm crashes for the same reason(?).. delayed kernel module load .. then a second successful try if still booting from "native" grub ..else no retry and lock-up -- 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/1821609 Title: lightdm login screen briefly appears and then blanks out on Intel(R) Core(TM)2 Duo CPU T5870 Status in lightdm package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Status in xorg-server package in Ubuntu: Invalid Bug description: Okay the has happened recently at least since march 18, 2019 iso and march 22, 2019 iso are both effected very similar to one of my previously reported bugs .. which was related to xorg not being installed .. back ground .. PC is lenovo sl 500 with evo860 SSD drive 3 partions contain installs of disco sda1 -- main working system -- I usually install grub from here as master .. sda6 and sda7 are test installs of disco daily iso's 03-18-2019, 03-22-2019 repectively on the test installs as long as the iso is using the grub boot loader installed from that install the system will boot normally .. the display manger tends to flicker on and off but does final start and login can proceed. but if another install re-installs grub as master the display manager fails to stay active or even come-up for sda6 or sda7 only if their own grubs are reinstalled will they work normally sda1 display manager/xorg login works always no matter which "grub- source" is in control. if I use rescue boot from any grub as master I can get the displays to work by running dpkg fix which does nothing .. and then resuming the boot .. then things work normally.. if the "non-rescue" boots are used the screen/computer locks and only a power down and reboot gives access. (sometime requiring radical depowering .. unpluging and removing battery) now the is a message that appears that RCs??? level is missing. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: xorg 1:7.7+19ubuntu11 ProcVersionSignature: Ubuntu 5.0.0-7.8-generic 5.0.0 Uname: Linux 5.0.0-7-generic x86_64 ApportVersion: 2.20.10-0ubuntu23 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: XFCE Date: Mon Mar 25 11:25:58 2019 DistUpgraded: Fresh install DistroCodename: disco DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GpuHangFrequency: Several times a day GpuHangReproducibility: Yes, I can easily reproduce it GpuHangStarted: Immediately after installing this version of Ubuntu GraphicsCard: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo Mobile 4 Series Chipset Integrated Graphics Controller [17aa:20e4] Subsystem: Lenovo Mobile 4 Series Chipset Integrated Graphics Controller [17aa:20e4] InstallationDate: Installed on 2019-03-23 (1 days ago) InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190322) MachineType: LENOVO 2746CTO ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-7-generic root=UUID=1d61086d-275b-4537-bed5-f2d3080670eb ro recovery nomodeset SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6AET64WW dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: 2746CTO dmi.board.vendor: LENOVO dmi.board.version: LENOVO 6AET64WW dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: LENOVO 6AET64WW dmi.modalias: dmi:bvnLENOVO:bvr6AET64WW:bd12/01/2010:svnLENOVO:pn2746CTO:pvrThinkPadSL500:rvnLENOVO:rn2746CTO:rvrLENOVO6AET64WW:cvnLENOVO:ct10:cvrLENOVO6AET64WW: dmi.product.name: 2746CTO dmi.product.version: ThinkPad SL500 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.97-1 version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.0-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1821609/+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
