uefi: demote expected no-GPT and no-EDID fallbacks from warn to debug

src/os/uefi/device.rs

@@ -41,7 +41,10 @@ fn gpt_find_redoxfs_offset(disk: &mut DiskEfi) -> u64 {
     header_buf[..copy_len].copy_from_slice(&read_buf[..copy_len]);
 
     if &header_buf[0..8] != b"EFI PART" {
-        log::warn!("GPT: no valid signature at LBA 1");
+        // Expected for a raw (partition-less) RedoxFS live image: there is no
+        // GPT, so fall back to the 2 MiB offset where RedoxFS lives. Diagnostic
+        // only, not a warning.
+        log::debug!("GPT: no signature at LBA 1 (raw RedoxFS image); using 2 MiB fallback");
         return 2 * crate::MIBI as u64;
     }
 

src/os/uefi/mod.rs

@@ -121,8 +121,13 @@ impl OsEfi {
                                     match EdidActive::handle_protocol(handle) {
                                         Ok(efi_edid) => Some(efi_edid),
                                         Err(err) => {
-                                            log::warn!(
+                                            // Many firmwares (incl. QEMU/OVMF) do
-                                                "Failed to get EFI EDID from handle {:?}: {:?}",
+                                            // not implement the EDID protocol; the
+                                            // resolution list still works without
+                                            // it, so this is diagnostic, not a
+                                            // warning.
+                                            log::debug!(
+                                                "EFI EDID unavailable from handle {:?}: {:?}",
                                                 handle,
                                                 err
                                             );