| Message ID | 56AAC66C.1080800@lwfinger.net (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Kalle Valo |
| Headers | show |
On Thu, Jan 28, 2016 at 5:54 PM, Larry Finger <Larry.Finger@lwfinger.net> wrote: > > I have been running an RTL8821AE since kernel 3.18 without hitting this > problem using a TRENDnet AC1750 dual-band AP. The UniFi may be doing > something that the driver is not expecting. I've had issues with unifi ap's before, but to be honest, I've had issues with lots of hotel and airport wifi too. I don't think the Unifi APs are outside of the normal spectrum.. > Attached is a minimal patch that comments out the "vht_cap->vht_supported = > true;" statement for both RTL8821AE and RTL8812AE in > _rtl_init_hw_vht_capab(). Does that allow your system to work? That works too, yes. > The patch > also logs some information regarding the channelplan and the country code. > Please let me know the values for those. rtlwifi: **** channelplan 127 rtlwifi: **** country code 13 > I apparently missed a previous complaint about this issue. If you still have > the reference, please send it to me. So googling for similar issues, I found https://bugzilla.redhat.com/show_bug.cgi?id=1168467 https://bugzilla.redhat.com/show_bug.cgi?id=1293136 where that second one in particular looks very like my issue ("Association succeeds, and ARP/DHCP work, but no IP frames can be transmitted"). In both cases you have to go into the dmesg attachment to see that its rtlwifi in both cases). And there's an ubuntuforum thread http://ubuntuforums.org/showthread.php?t=2226009&page=2 where it you follow the thing, it's an rtl chip on a PCI card, and it has very similar "connected but no internet" behavior, along with the "net/mac80211/rate.c:526" warning (different line numbers, different kernel version, but it smells similar). Or this one: http://forums.debian.net/viewtopic.php?f=5&t=111781 which is also rtl-wifi, and also has the "associated, connected, got an IP, but no data, not even a ping" behavior. It also has the warning, but it looks different in other ways (2.4GHz only and actually says it's not doing HT/VHT). So I don't know. The warning in net/mac80211/rate.c:does seem to be associated with the realtek driver. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, 2016-01-28 at 19:54 -0600, Larry Finger wrote: > > I have been running an RTL8821AE since kernel 3.18 without hitting > this problem > using a TRENDnet AC1750 dual-band AP. The UniFi may be doing > something that the > driver is not expecting. Are you quite sure you're actually using VHT though, perhaps the AP somehow turned it off? It seems unlikely that you could successfully use it in any way given that RATE_INFO_FLAGS_VHT_MCS doesn't show up in the driver or rate scaling at all. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, 2016-01-29 at 10:12 -0600, Larry Finger wrote: > > Upon further inspection, my log has the line "rtl8821ae 0000:02:00.0 > wlp2s0: disabling HT/VHT due to WEP/TKIP use". I need to fix that > first. > Likely TKIP; enable only WPA2 (CCMP) on the AP. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 01/29/2016 10:15 AM, Johannes Berg wrote: > On Fri, 2016-01-29 at 10:12 -0600, Larry Finger wrote: >> >> Upon further inspection, my log has the line "rtl8821ae 0000:02:00.0 >> wlp2s0: disabling HT/VHT due to WEP/TKIP use". I need to fix that >> first. >> > Likely TKIP; enable only WPA2 (CCMP) on the AP. I found and fixed it. The AP was using only 20 MHz channels, but now is configured for 20/40/80. That duplicates the warning for me and the lack of throughput even though it associates and authenticates. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c index 0517a4f..2464d41 100644 --- a/drivers/net/wireless/realtek/rtlwifi/base.c +++ b/drivers/net/wireless/realtek/rtlwifi/base.c @@ -248,7 +248,7 @@ static void _rtl_init_hw_vht_capab(struct ieee80211_hw *hw, if (rtlhal->hw_type == HARDWARE_TYPE_RTL8812AE) { u16 mcs_map; - vht_cap->vht_supported = true; + /* vht_cap->vht_supported = true; */ vht_cap->cap = IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 | IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 | @@ -282,7 +282,7 @@ static void _rtl_init_hw_vht_capab(struct ieee80211_hw *hw, } else if (rtlhal->hw_type == HARDWARE_TYPE_RTL8821AE) { u16 mcs_map; - vht_cap->vht_supported = true; + /* vht_cap->vht_supported = true; */ vht_cap->cap = IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 | IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 | diff --git a/drivers/net/wireless/realtek/rtlwifi/regd.c b/drivers/net/wireless/realtek/rtlwifi/regd.c index 5be3411..38f464e 100644 --- a/drivers/net/wireless/realtek/rtlwifi/regd.c +++ b/drivers/net/wireless/realtek/rtlwifi/regd.c @@ -340,6 +340,7 @@ static int _rtl_reg_notifier_apply(struct wiphy *wiphy, static const struct ieee80211_regdomain *_rtl_regdomain_select( struct rtl_regulatory *reg) { + pr_info("**** country code %d\n", reg->country_code); switch (reg->country_code) { case COUNTRY_CODE_FCC: return &rtl_regdom_no_midband; @@ -400,6 +401,7 @@ static struct country_code_to_enum_rd *_rtl_regd_find_country(u16 countrycode) static u8 channel_plan_to_country_code(u8 channelplan) { + pr_info("**** channelplan %d\n", channelplan); switch (channelplan) { case 0x20: case 0x21: