Issue
I'm trying to run freshly built Android image on emulator (generic aosp_x86-eng
target built from current master
using Google sources). The emulator seems to be working fine, except it does not mount external SD card when run with -sdcard
option. Emulator version is the one that comes from the git. Everything is executed on a headless server.
My complete list of steps:
repo init -u https://android.googlesource.com/platform/manifest
repo sync
. build/envsetup.sh
lunch aosp_x86-eng
make -j16
mksdcard 1G sd.img
emulator -no-window -no-skin -no-audio -sdcard sd.img &
adb shell mount | grep vfat
The virtual device appears to be correctly forwarded, as seen by the output of adb shell blkid
:
/dev/block/vda1: LABEL="system" UUID="da594c53-9beb-f85c-85c5-cedf76546f7a" TYPE="ext4"
/dev/block/vdb: LABEL="cache" UUID="f73de97f-7017-ca5e-9b47-ca9c8f633e83" TYPE="ext4"
/dev/block/vde1: LABEL="vendor" UUID="6d16bab1-58d9-3c5d-8f14-f608f924affd" TYPE="ext4"
/dev/block/vdf: LABEL="SDCARD" UUID="1CEA-0B06" TYPE="vfat"
However, it is not mounted by vold
. What could be the problem?
I also get the same result when I run emulator using Android 8 image downloaded via SDK manager. With Android 7, SD card works OK.
EDIT:
Solved the issue for emulator that comes with aosp_x86-eng build (see my own answer). On the emulator from Android SDK, the cause is probably different.
Solution
Turns out, in my case headless mode was the culprit. When I run emulator with -no-skin -no-window
options, SD card is not mounted. If I remove these options (and enable X11 forwarding, since I work on a headless server), everything works correctly.
I still want to know why I can't use SD card in headless mode, but at least I was able to solve the problem for the required task.
Answered By - Thunderbeef
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