Miles O'Neal wrote: > I would look into a new video driver. Which driver were you using?
Nouveau, last updated a year ago in January. I have now found this in the 7.4 release notes (should have looked before!): "The default DDX driver has changed to be xf86-video-modesetting. The previous defaults were xf86-video-nouveau (Nvidia hardware) and xf86-video-intel (Intel hardware)." Sorry for my ignorance, but is there a way at the boot command to restore the old default? Or some other better approach? One puzzle: this last kernel/firmware update, which caused the blank screen after boot, seems to have been a 7.4 update, but /etc/sl-release shows me still as 7.3. Thanks. Steve Talbott > >> On Feb 23, 2018, at 17:11, Steve Talbott <ste...@natureinstitute.org> >> wrote: >> >> Greetings, all -- >> >> Courtesy of an SL7 kernel and firmware update yesterday (yum details >> below), I get an eternal black screen upon booting not only the new >> kernel: >> >> kernel-3.10.0-693.17.1.el7.x86_64 >> >> but also the previous one: >> >> kernel-3.10.0-693.2.2.el7.x86_64 >> >> and the one before that, as well as the rescue kernels in my grub menu >> So >> I have lost all useful access to my computer. I can, however, access the >> disk and all my files by mounting them from a 7.3 live install disk. My >> computer is an HP Pavilion desktop. >> >> The command I executed was simply: >> >> # yum update >> >> Updates other than the kernel occur automatically, and, as you can see >> from the above, it was a fair while since I had last updated the kernel. >> My system was initially installed as 7.3. I've never been quite clear, >> based on seemingly contradictory indications, whether it is now "on the >> way" to 7.4, or is already a fully qualified 7.4 system. It's whatever >> the >> automatic updates (and my occasional kernel updates) have given me. >> >> I am not competent to do much with the messages from /var/log/messages, >> but as far as I can tell they look more or less normal. I don't see any >> sign of some glaring fatal error. If someone would like me to extract a >> relevant subset of them, I should be able to do so. >> >> I gather that the yum updates can't be rolled back. Any advice on how >> to >> proceed from here? (This is secondary, but it would be temporaily >> helpful >> if I could chroot to the root of my filesystem from the live install >> DVD, >> and do some work. The live install disk doesn't seem to give an option >> of >> going into rescue mode.) >> >> The yum log shows: