On Mon, Feb 28, 2022, 3:43 PM John Goerzen <jgoer...@complete.org> wrote:
> Hi, > > 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 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! > I had something similar happen with Debian 8 a long time ago. It turned out to be because the driver/firmware/grafx-chipset had the wrong idea about the monitor's available resolutions and modes. It was using too high a resolution. Thanks, > > John > >
