This patch seems to fix the issue on Ubuntu 4.4 kernel. The ath10k driver structure has been changed after 4.4, so this fix can't apply to 4.8+ kernel, and it looks like should stay in 4.4 kernel only.
--- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3563,6 +3563,8 @@ static void ath10k_tx(struct ieee80211_hw *hw, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; __le16 fc = hdr->frame_control; + skb_orphan(skb); + /* We should disable CCK RATE due to P2P */ if (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1692836 Title: Dell XPS 9360 wifi 5G performance is poor Status in linux package in Ubuntu: In Progress Bug description: TX throughput is not good in Ubuntu in IEEE 802.11ac mode. Measured Rx 60Mbit/s and Tx 12Mbit/s with Ubuntu Windows 10 (1607) performs much better with on transmit side Rx 73MBit/s and Tx 62MBit/s using the same hardware setup. Same result with WPA2 disabled in unencrypted mode. Steps to Reproduce: 1. connect to Wifi 2. copy a large file from XPS 13 to a share on a 2nd system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1692836/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp