John Goerzen composed on 2022-02-28 15:43 (UTC-0600):
> I have a system with a GeForce 1050 Ti on bullseye.
> On this system, if I log in as a regular user and run startx, everything
> works fine; KDE Plasma comes up and it's all good.
> But sddm doesn't work. In fact, when it starts, it causes my monitor to
> go "no signal". Oddly, though, if I can log in blindly, then once I hit
> enter after putting in my password, KDE will come up and work like it
> should.
> I also tried lightdm and xdm. Both of them also had "no signal" when
> starting.
> It is using the nouveau driver.
There are two nouveau drivers:
kernel device
display device
modesetting
nouveau
Both possible full-function display device drivers depend on the nouveau kernel
driver (module). inxi -Gayz will show both. Try switching from the one in
current
use to the other. Adding or purging xserver-xorg-video-nouveau is typically the
simplest way to switch between them. /etc/X11/xorg.conf.d/ can also be used to
make the switch by explicitly declaring the chosen driver. The in-use display
driver is announced in roughly half the lines in each Xorg.#.log.
> There are no errors in Xorg.0.log,
> journalctl, dmesg, syslog, or the xsession log. lspci doesn't show any
> other graphics adapter. xrandr on the sddm session shows it detected
> the appropriate output at the appropriate resolution. Xorg.0.log looks
> completely appropriate; detecting devices, setting them up, etc.
> If I boot the same drive on a different box with Intel graphics, sddm
> works fine.
> This is a fresh bullseye install.
> A am utterly baffled; I'd think at least xdm should work!
Try disabling Plymouth, appending one of the following to the end of the linu
line
after striking the E key at the Grub menu:
plymouth=0
noplymouth
plymouth.enable=0
If none help, try appending your display's native mode & refresh instead, e.g.:
video=1920x1080@60
If this works, likely an edit to /etc/default/grub about graphics handling or
theme, and regeneration of /boot/grub/grub.cfg, is indicated.
--
Evolution as taught in public schools is, like religion,
based on faith, not based on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata
