jdd@dodin.org composed on 2018-04-28 18:28 (UTC+0200):
Here I just ask for general debug ideas, as the relevant computer is not in my hands, but I may have to work on it or it's brothers some day.
it's an old computer, 7 years old, but sufficient and 64 bits, but only 2Gb ram. Intel graphics. Desktop.
Sounds like Intel's Sandy Bridge chipset and HD 2000 graphics.
I first installed tumbleweed 32 bits, then (today) tested live Leap 15, with same result: when started as init 3 (number 3 added at the end on grub linux line), works.
When started as default, the screen blinks with around 1/2s frequency, obviously its's X that stops and restart as the keyboard is nearly not responsive (unusable).
I tried nomodeset, vga on linux grub line, same result
The two competent Xorg video drivers (modesetting, internal to Xorg; xf86-video-intel) for use with Intel absolutely require modesetting. nomodeset on cmdline is for repairing problems or troubleshooting only. The crude fallback xorg drivers (fbdev & vesa) may or may not be functional while modesetting is disabled.
start X from terminal and blinking, the blinking continues even after the return under terminal.
Does it also blink if you boot with 3 on cmdline, login as root, then try 'startx'? If that works, try startx as normal user (probably will generate a permissions error).
But...
opensuse 12.1 works as expected
I could install 13.2 32 bits from live usb and it worked with graphics
nothing visible in X logs, apart the last line (stopped on error (1))
what can I save as ideas to test next time?
the problem was visible at my LUG meeting but also at the owners home (different monitor)
Things to try (in order): 1-if the PC and display have alternate cable types that could be used, try the different cable type(s) (DVI, VGA, DisplayPort, HDMI) 2-'zypper rm xf86-video-intel' (simplest way to switch to modesetting xorg driver). If not already installed, install it. 3-drm-kmp-default: if installed, remove; if not installed, install 4-'zypper rm plymouth' (first test with plymouth.enable=0 on cmdline) 5-Replace sddm with kdm or lightdm or gdm. Run 'lspci -nnk | grep -A4 VGA' and 'inxi -G -c0' and report results if problem remains and you need to continue the thread. -- "Wisdom is supreme; therefore get wisdom. Whatever else you get, get wisdom." Proverbs 4:7 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org