nginx+ECC 证书+http2， chrome49，访问无限 CONNECTION_RESET

如题。我使用的是 Mozilla 的推荐配置文件， nginx-1.9.9 ， openssl-1.0.2f ， let's encrypt 的 ECC 证书。翻袋了一个维基百科。然而用 chrome 访问时，出现无限 CONNECTION_RESET 错误。尝试换成了普通 RSA 证书，就能正常打开。
服务端系统是 ubuntu14.04 64 位
求指点，感谢！

系统是 OS X 10.11.3

完整配置文件在下面
```
server {
server_name g.n4l.pw;
listen 80;
location ^~ /.well-known/acme-challenge/ {
alias /home/wwwroot/challenges/;
try_files $uri =404;
}
}
server {
listen 443 ssl http2;
#listen [::]:443 ssl http2;

# certs sent to the client in SERVER HELLO are concatenated in ssl_certificate
ssl_certificate /path/to/ecc.crt;
ssl_certificate_key /path/to/ecc.key;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
ssl_ecdh_curve secp384r1;
# Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
ssl_dhparam /path/to/dhparams.pem;

# modern configuration. tweak to your needs.
ssl_protocols TLSv1.2;
ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
ssl_prefer_server_ciphers on;

# HSTS (ngx_http_headers_module is required) (15768000 seconds = 6 months)
add_header Strict-Transport-Security 'max-age=15768000;includeSubDomains;preload';

# OCSP Stapling ---
# fetch OCSP records from URL in ssl_certificate and cache them
ssl_stapling on;
ssl_stapling_verify on;

## verify chain of trust of OCSP response using Root CA and Intermediate certs
#ssl_trusted_certificate /root/ssl/intermediate.pem;

resolver 8.8.8.8 8.8.4.4;
location / {
proxy_set_header Host 'zh.wikipedia.org';

proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass https://zh.wikipedia.org/;
proxy_set_header Accept-Encoding "";

}
```