Greetings! My system is LinuxMint 20.2 which is installed on Laptop HP ProBook 455 G7 (1F3M4EA), WiFi chip is RTL8822CE. Time after time my WiFi stops and only reboot helps. When it happens I have WiFi connection in tray, but there is no real connection even with local router. When I try switch off WiFi in tray and then switch on I can not connect to router, error appears. Only after reboot WiFi works again. This problem appeared very often with 5 GHz WiFi and with Kernels before 5.17.0. In that combination WiFi stoped even when I visited speedtest site. It was impossible to pass the speed test. It looked like wifi card "choked" with huge data flow. It was for 5.15... 5.16... Kernels, but after 5.17.0 situation became better. The stopping of WiFi appears once per day or per few days. My record is 10 days of stable work before WiFi stoped. Of course, I googled about this problem and tried to do everything. For example, disabled power management. I compiled new Kernels, now I have 6.0 Kernel. But the situation is the same. The result of dmesg when wifi is stopped is: [433208.039535] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[1] [435127.696255] rtw_8822ce 0000:02:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000b address=0xfebf3840 flags=0x0000] [435137.009872] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[1] [435137.009977] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[3] [435137.010109] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[1] [435137.010208] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[3] [435137.339506] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[1] [435137.339622] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[3] [435137.339731] rtw_8822ce 0000:02:00.0: timed out to flush pci tx ring[5] ... and so on. Every time when Wifi stopped I see the line like this: [435127.696255] rtw_8822ce 0000:02:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000b address=0xfebf3840 flags=0x0000] I assume this message somehow related to the core of the problem. Moreover, I have found this is not only my problem. Other people also have the similar problem with realtek chips drivers. These are the cases: ----------------- 1) Hello, I noticed a problem with my rtw_8822ce wifi recently, it drops connection randomly. Hard reboot is required. From NetworkManager it looks like it is connected, but there is no internet connection. In dmesg I have: [ 521.400458] rtw_8822ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0009 address=0xfbc81414 flags=0x0000] When I am reconnection with NetworkManager in dmesg I have lots of these [ 629.991505] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[1] but from logs you can observe that it is in fact connected Full log: [ 45.038243] rtw_8822ce 0000:01:00.0: enabling device (0000 -> 0003) [ 45.044230] rtw_8822ce 0000:01:00.0: Firmware version 9.9.4, H2C version 15 [ 45.044485] rtw_8822ce 0000:01:00.0: Firmware version 9.9.10, H2C version 15 [ 45.282040] rtw_8822ce 0000:01:00.0 wlp1s0: renamed from wlan0 [ 46.264046] rtw_8822ce 0000:01:00.0: start vif 28:cd:c4:6b:a5:37 on port 0 [ 46.265701] rtw_8822ce 0000:01:00.0: stop vif 28:cd:c4:6b:a5:37 on port 0 [ 46.493493] rtw_8822ce 0000:01:00.0: start vif de:2a:1e:61:0c:c0 on port 0 [ 50.739107] rtw_8822ce 0000:01:00.0: stop vif de:2a:1e:61:0c:c0 on port 0 [ 50.967006] rtw_8822ce 0000:01:00.0: start vif 28:cd:c4:6b:a5:37 on port 0 [ 50.971579] rtw_8822ce 0000:01:00.0: stop vif 28:cd:c4:6b:a5:37 on port 0 [ 51.205701] rtw_8822ce 0000:01:00.0: start vif a6:28:ed:35:f0:f0 on port 0 [ 55.285903] rtw_8822ce 0000:01:00.0: stop vif a6:28:ed:35:f0:f0 on port 0 [ 55.515710] rtw_8822ce 0000:01:00.0: start vif 28:cd:c4:6b:a5:37 on port 0 [ 60.163246] rtw_8822ce 0000:01:00.0: sta 5a:ef:68:a6:25:96 joined with macid 0 [ 521.400458] rtw_8822ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0009 address=0xfbc81414 flags=0x0000] [ 629.991505] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[1] [ 629.991610] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[3] [ 629.991746] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[1] [ 629.991844] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[3] [ 630.262274] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[1] [ 630.262383] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[3] [ 630.262481] rtw_8822ce 0000:01:00.0: timed out to flush pci tx ring[5] .… ( https://bugzilla.kernel.org/show_bug.cgi?id=214097 ) 2) This happens whenever under medium load. It is very consistent. When it occurs, there is no network connectivity until I ifconfig eth0 down/up, dhclient eth0. Then it works until I put a load on the network card again by just pushing some files back and forth. Basic Internet usage doesn't seem to trigger it, but higher speed traffic to/from a machine on the network and poof, gone. The network card still appears in lspci, ifconfig insists it is working, but no traffic will move until I reset it. Dmesg line is: [ 1140.466954] AMD-Vi: Event logged [IO_PAGE_FAULT device=28:00.0 domain=0x000b address=0x0000000001091000 flags=0x0050] Device 28:00:00 is: 28:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) Slackware 64 bit, current patch level, 4.4.88 kernel. A bit of googling turned up some old complaints of this, having to do with the nic driver. I'm not quite sure where to go from here, other than trying a different (newer or older) kernel. Advice welcome. ( https://www.linuxquestions.org/questions/slackware-14/amd-vi-event-logged-%5Bio_page_fault-ethernet-controller-4175615079/ ) 3) So I recently upgraded the internals of my Ubuntu Server so that it's running a new motherboard, new processor, etc. And ever since then, I've been getting errors that look like this: Code: AMD-Vi: Event logged [IO_PAGE_FAULT device=02:00.0 domain 0x001d address=0x0000000000003000 flags=0x0050] Sometimes they don't appear to do anything, however sometimes after encountering this, the network stops working properly. I've searched for answers regarding this, however most are either unresolved or involve hardware that isn't relevant here (such as the graphics card causing the fault, and issues starting the desktop environment). Running Code: sudo lspci -vnn | grep 02:00.0 -A9 confirms this and lists info about the ethernet controller: Code: 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev. 0c) Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:7969] Flags: bus master, fast devsel, latency 0, IRQ 87 I/O ports at e000 [size=256] Memory at fe900000 (64-bit, non-prefetchable) [size=4K] Memory at d0800000 (64-bit, prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=4 Masked- I've also read that there is probably an issue with IOMMU, however I have no way to control whether or not this is turned on in the BIOS (there is no option), and adding Code: iommu=pf or Code: iommu=soft doesn't have any effect on the problem. Is there anyone that could shed some light on this? The server is currently unusable, since the problem happens usually within 5 minutes of booting, and only a reboot can fix it. ( https://ubuntuforums.org/showthread.php?t=2290992 ) ------------------------------ I hope my problem, and mentioned problem of other people shows that there is objective problem with drivers for Realtek wifi cards. I hope that this message will help to improve these drivers. Thanks. - - - - - Pavlo Pyshkin, PhD Phone: +380969266455 Web: pavlopyshkin . wordpress . com
