diff --git a/trans.sh b/trans.sh
index ffd441a..44b76cc 100644
--- a/trans.sh
+++ b/trans.sh
@@ -1307,6 +1307,23 @@ install_redhat_ubuntu() {
         download $iso /os/installer/ubuntu.iso
         console_cmdline=$(get_ttys console=)
 
+        apk add dmidecode
+        dmi=$(dmidecode)
+        # https://github.com/systemd/systemd/blob/main/src/basic/virt.c
+        # https://github.com/canonical/cloud-init/blob/main/tools/ds-identify
+        # http://git.annexia.org/?p=virt-what.git;a=blob;f=virt-what.in;hb=HEAD
+        if echo "$dmi" | grep -Eiw "amazon|ec2"; then
+            kernel=aws
+        elif echo "$dmi" | grep -Eiw "Google Compute Engine|GoogleCloud"; then
+            kernel=gcp
+        elif echo "$dmi" | grep -Eiw "OracleCloud"; then
+            kernel=oracle
+        elif echo "$dmi" | grep -Eiw "7783-7084-3265-9085-8269-3286-77"; then
+            kernel=azure
+        else
+            kernel=generic
+        fi
+
         # 正常写法应该是 ds="nocloud-net;s=https://xxx/" 但是甲骨文云的ds更优先，自己的ds根本无访问记录
         # $seed 是 https://xxx/
         cat <<EOF >$grub_cfg
@@ -1316,7 +1333,7 @@ install_redhat_ubuntu() {
             # rmmod tpm
             search --no-floppy --label --set=root installer
             loopback loop /ubuntu.iso
-            linux (loop)/casper/vmlinuz iso-scan/filename=/ubuntu.iso autoinstall noprompt noeject cloud-config-url=$ks $extra_cmdline --- $console_cmdline
+            linux (loop)/casper/vmlinuz iso-scan/filename=/ubuntu.iso autoinstall noprompt noeject cloud-config-url=$ks $extra_cmdline extra.kernel=$kernel --- $console_cmdline
             initrd (loop)/casper/initrd
         }
 EOF
diff --git a/ubuntu.yaml b/ubuntu.yaml
index 5c185e3..8240181 100644
--- a/ubuntu.yaml
+++ b/ubuntu.yaml
@@ -7,6 +7,8 @@ autoinstall:
   source:
     id: ubuntu-server-minimal
     search_drivers: false
+  kernel:
+    package: linux-generic
   timezone: Asia/Shanghai
   ssh:
     allow-pw: true
@@ -18,7 +20,7 @@ autoinstall:
       # https://askubuntu.com/questions/1302392/ubuntu-server-20-04-setup-stuck-at-block-probing-did-not-discover-any-disks
       mount | grep /isodevice && { losetup -d /dev/loop0; umount -l /isodevice; } || true
 
-      # 提取 extra.confhome
+      # 提取 extra.confhome extra.kernel
       prefix=extra
       for var in $(grep -o "\b$prefix\.[^ ]*" /proc/cmdline | xargs); do
           eval "$(echo $var | sed -E "s/$prefix\.([^=]*)=(.*)/\1='\2'/")"
@@ -27,18 +29,23 @@ autoinstall:
       # 生成分区信息
       curl -L $confhome/ubuntu-storage-early.sh | bash -s
 
+      # 内核风味
+      # https://bugs.launchpad.net/subiquity/+bug/1989353
+      sed -i "s/generic/$kernel/" /run/kernel-meta-package
+      sed -i "/package:/s/generic/$kernel/" /autoinstall.yaml
+
       # 禁用 DNS  强制离线安装内核和跳过最后的更新
       # 但安装器会配置时区和写入最近的mirror到/etc/apt/sources.list 所以要提前解析
       # dig会显示cname结果，cname会以.结尾，grep -v '\.$' 表示去除 cname 结果
-      echo $(dig +short geoip.ubuntu.com | grep -v '\.$' | head -1) geoip.ubuntu.com >>/etc/hosts
-      sed -i -E 's/(^nameserver )/#\1/' /etc/resolv.conf
+      # echo $(dig +short geoip.ubuntu.com | grep -v '\.$' | head -1) geoip.ubuntu.com >>/etc/hosts
+      # sed -i -E 's/(^nameserver )/#\1/' /etc/resolv.conf
   late-commands:
     - |
       # root ssh 登录
       echo "PermitRootLogin yes" >/target/etc/ssh/sshd_config.d/01-permitrootlogin.conf
 
       # 还原 DNS
-      sed -i -E 's/^#(nameserver )/\1/' /etc/resolv.conf
+      # sed -i -E 's/^#(nameserver )/\1/' /etc/resolv.conf
 
       # 提取 extra.confhome
       prefix=extra