Initial commit

scripts/optimize/rollback.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+# Rollback optimization changes
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/../../lib/common.sh"
+
+GRUB_FILE="/etc/default/grub"
+BACKUP_DIR="$(data_dir backups)"
+
+log_header "Rollback Optimizations"
+
+# ── 1. GRUB rollback ────────────────────────────────────
+log_info "GRUB backups:"
+mapfile -t grub_backups < <(find "$BACKUP_DIR" -name 'grub-*.bak' -print 2>/dev/null | sort -r)
+
+if (( ${#grub_backups[@]} == 0 )); then
+    log_info "  No GRUB backups found"
+else
+    for i in "${!grub_backups[@]}"; do
+        printf "  [%d] %s\n" "$i" "${grub_backups[$i]}"
+    done
+    echo ""
+
+    if confirm "Restore most recent GRUB backup?"; then
+        require_root
+        backup="${grub_backups[0]}"
+        cp "$backup" "$GRUB_FILE"
+        log_success "GRUB restored from: $backup"
+
+        log_info "Regenerating boot configuration..."
+        if is_cmd grubby; then
+            # On BLS systems, also need to remove args via grubby
+            grubby --update-kernel=ALL --remove-args="iommu amdgpu.gttsize ttm.pages_limit" 2>/dev/null || true
+            log_success "Boot entries updated via grubby"
+        elif [[ -d /boot/grub2 ]]; then
+            grub2-mkconfig -o /boot/grub2/grub.cfg
+            log_success "GRUB regenerated via grub2-mkconfig"
+        elif [[ -d /boot/grub ]]; then
+            grub-mkconfig -o /boot/grub/grub.cfg
+            log_success "GRUB regenerated via grub-mkconfig"
+        else
+            log_error "Could not find grubby or grub config directory. Regenerate manually."
+        fi
+        log_warn "Reboot required for changes to take effect."
+    fi
+fi
+
+# ── 2. Tuned profile rollback ───────────────────────────
+prev_profile_file="$BACKUP_DIR/tuned-previous-profile.txt"
+if [[ -f "$prev_profile_file" ]]; then
+    prev_profile="$(cat "$prev_profile_file")"
+    current="$(tuned-adm active 2>/dev/null | sed 's/Current active profile: //' || echo "unknown")"
+    log_info "Tuned profile: $current (previous: $prev_profile)"
+
+    if [[ "$current" != "$prev_profile" ]] && confirm "Restore tuned profile to $prev_profile?"; then
+        sudo tuned-adm profile "$prev_profile"
+        log_success "Tuned profile restored to: $prev_profile"
+    fi
+else
+    log_info "No previous tuned profile saved"
+fi
+
+# ── 3. BIOS reminder ────────────────────────────────────
+echo ""
+log_warn "BIOS VRAM changes cannot be rolled back automatically."
+log_info "To revert: Reboot → F10 → Advanced → UMA Frame Buffer Size → restore previous value"