Resume Marker — 2026-08-20

Status: kernel ready for compile, workhorse ready for Xfce switching, stopped before heavy build

Kernel build environment — READY (stopped before heavy compile per user request)
- Kernel: vanilla v6.19.3 + ipu4 drivers (GRUB entry LOCALVERSION=-ipu4p)
- ./check green, git clean
- Rust toolchain: stable 1.97.1 (default) + nightly 1.100.0 installed via rustup
- CONFIG_RUST=y set in .config, CONFIG_RUST_IS_AVAILABLE=y
- scripts/target.json has rustc-abi: x86-softfloat (rejected by stable, OK with nightly)
- Build fix identified: RUSTC=/root/.cargo/bin/rustc RUSTLIB_SRC=... make ... to use nightly
- Build NOT started — user wants new session for the heavy compile
GUI session switching — READY (workhorse has Xfce, GDM shows it)
- Xfce 4.20.2 + xfce4-goodies installed on workhorse
- /usr/share/xsessions/xfce.desktop present, Exec=startxfce4
- GDM (gdm3) active, shows xfce.desktop + xfce-wayland.desktop at login gear menu
- User can switch GNOME↔Xfce at GDM login by clicking gear icon → "Xfce Session"
- lightdm package removed (was stuck half-configured; cleaned up via dpkg purge)
- No lightdm; gdm3 is the DM; /etc/X11/default-display-manager = /usr/sbin/gdm3

Kernel compile: make -j$(nproc) bzImage modules with nightly rustc override
- Command pattern: cd /home/CUBELinux/CUBELinux-2/src/CUBELinux-build && RUSTC=/root/.cargo/bin/rustc HOSTRUSTC=/root/.cargo/bin/rustc make -j$(nproc) bzImage modules
- Need to confirm RUST_LIB_SRC path for nightly toolchain
- User explicitly asked NOT to auto-launch — new session should decide timing
GRUB: new entry for -cube kernel; verify ipu4p entry still works
Post-boot verification: cube fs mount, daemon startup, camera (ipu4) if desired

User restarted the session; this marker captures where we left off
User directive: "get project to point of compiling new kernel, then stop so we can use new session for that"
Heavy compile (make -j8) saturates all cores + memory — do NOT start without user go