LMDE2 internet conn fail with 3.18.13-rt10mah+

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10 years 2 months ago #78292 by jtc
LMDE2 internet conn fail with 3.18.13-rt10mah+ was created by jtc
Hi.


I'm using a mesa 7i76E on a pc with LMDE2. with the preempt kernel 3.18.13-rt10mah+ kernel if I connect to the internet by an wifi usb adapter, after a few minutes, the internet freezes. I cant even do a ping, But using another kernel (3.16.0-4-586) everything related to the internet or wifi connection seems to be ok.

I did a lsmod on both kernels, that is he outputs:


this are the modles on 3.18.13-rt10mah+
Code:
Module ctr ccm bnep bluetooth cpufreq_powersave cpufreq_stats cpufreq_userspace cpufreq_conservative binfmt_misc nls_utf8 nls_cp437 vfat fat fuse ecryptfs lp dm_crypt uinput arc4 rtl8192cu rtl_usb rtl8192c_common rtlwifi mac80211 cfg80211 rfkill iTCO_wdt iTCO_vendor_support ppdev coretemp kvm microcode snd_pcm snd_timer psmouse snd serio_raw soundcore pcspkr lpc_ich i2c_i801 mfd_core shpchp battery parport_pc parport evdev processor hid_generic usbhid hid ext4 crc16 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod sg sd_mod crc32c_intel xhci_pci xhci_hcd r8169 mii usbcore usb_common thermal fan ahci libahci i915 libata video i2c_algo_bit drm_kms_helper drm scsi_mod button i2c_core thermal_sys

on the default kernel:
Code:
ctr ccm cpufreq_powersave cpufreq_stats cpufreq_userspace cpufreq_conservative bnep bluetooth 6lowpan_iphc binfmt_misc nls_utf8 nls_cp437 vfat fat fuse ecryptfs lp dm_crypt uinput arc4 rtl8192cu rtl_usb rtlwifi rtl8192c_common mac80211 cfg80211 rfkill iTCO_wdt iTCO_vendor_support ppdev intel_powerclamp intel_rapl coretemp kvm crc32_pclmul psmouse serio_raw pcspkr i2c_i801 lpc_ich shpchp snd_soc_rt5640 snd_soc_rl6231 battery parport_pc parport snd_soc_core snd_compress snd_pcm snd_timer snd soundcore regmap_i2c snd_soc_sst_acpi i2c_designware_platform i2c_designware_core iosf_mbi evdev processor ext4 crc16 mbcache jbd2 dm_mirror dm_region_hash dm_log dm_mod hid_generic usbhid sg sd_mod crc_t10dif crct10dif_generic crct10dif_common crc32c_intel ahci libahci xhci_hcd r8169 mii usbcore usb_common libata scsi_mod i915 i2c_algo_bit drm_kms_helper drm fan video i2c_hid hid i2c_core sdhci_acpi sdhci mmc_core button thermal thermal_sys


If I do a lsmod when the internet connection fails, the output is the same, so at the moment I had no clue what can do this. any help will be welcome.

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10 years 2 months ago #78295 by ArcEye
Replied by ArcEye on topic LMDE2 internet conn fail with 3.18.13-rt10mah+

I'm using a mesa 7i76E on a pc with LMDE2. with the preempt kernel 3.18.13-rt10mah+


Michael will have probably built that kernel on Debian Jessie, but rt-preempt kernels are generally quite forgiving and transferable

..... I connect to the internet by an wifi usb adapter ......


Unless you say what the wifi adapter is and which chipset it contains, the list of modules does not help.

Run tail -f /var/log/messages when you plug the usb adaptor in to see what is reported
I got this plugging in a crappy old usb wifi stick( they are all crappy B) )
Code:
Aug 2 17:14:10 INTEL-i7 kernel: [ 1227.882710] usb 4-1.5: new high-speed USB device number 6 using ehci-pci Aug 2 17:14:10 INTEL-i7 kernel: [ 1228.012357] usb 4-1.5: New USB device found, idVendor=148f, idProduct=5370 Aug 2 17:14:10 INTEL-i7 kernel: [ 1228.012363] usb 4-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Aug 2 17:14:10 INTEL-i7 kernel: [ 1228.012366] usb 4-1.5: Product: 802.11 n WLAN Aug 2 17:14:10 INTEL-i7 kernel: [ 1228.012369] usb 4-1.5: Manufacturer: Ralink Aug 2 17:14:10 INTEL-i7 kernel: [ 1228.012371] usb 4-1.5: SerialNumber: 1.0 Aug 2 17:14:10 INTEL-i7 mtp-probe: checking bus 4, device 6: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.5" Aug 2 17:14:10 INTEL-i7 mtp-probe: bus: 4, device: 6 was not an MTP device Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.198772] usb 4-1.5: reset high-speed USB device number 6 using ehci-pci Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.318285] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5390, rev 0502 detected Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.347022] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 5370 detected Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.350263] usbcore: registered new interface driver rt2800usb Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.357351] rt2800usb 4-1.5:1.0 wlan1: renamed from wlan0 Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.393039] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin' Aug 2 17:14:11 INTEL-i7 kernel: [ 1229.393264] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29

You also need to check you have the firmware for that NIC installed, (eg, firmware-realtek firmware-linux-nonfree )
which may entail fetching from sid or whatever to get the up to date ones.

Then remake initrd.img-3.18.13-rt10 to ensure it is up to date.
This is ancient, but the process remains the same
ww.fdsd.co.uk/wiki/Tech/HowToRebuildInitrdImage.twiki.html

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10 years 2 months ago #78321 by jtc
Replied by jtc on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
that is my tail -f /var/log/messages otput:
Code:
cnc@cnc-pc ~ $ tail -f /var/log/messages Aug 3 12:55:08 cnc-pc kernel: [ 74.896701] cfg80211: DFS Master region: unset Aug 3 12:55:08 cnc-pc kernel: [ 74.896705] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Aug 3 12:55:08 cnc-pc kernel: [ 74.896711] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Aug 3 12:55:08 cnc-pc kernel: [ 74.896716] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Aug 3 12:55:08 cnc-pc kernel: [ 74.896720] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) Aug 3 12:55:08 cnc-pc kernel: [ 74.896726] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) Aug 3 12:55:08 cnc-pc kernel: [ 74.896731] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) Aug 3 12:55:08 cnc-pc kernel: [ 74.896736] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) Aug 3 12:55:08 cnc-pc kernel: [ 74.896741] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) Aug 3 12:55:08 cnc-pc kernel: [ 74.896746] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) Aug 3 12:55:34 cnc-pc kernel: [ 100.454977] usb 1-2.3: new high-speed USB device number 6 using xhci_hcd Aug 3 12:55:34 cnc-pc kernel: [ 100.544073] usb 1-2.3: New USB device found, idVendor=0bda, idProduct=8178 Aug 3 12:55:34 cnc-pc kernel: [ 100.544082] usb 1-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Aug 3 12:55:34 cnc-pc kernel: [ 100.544087] usb 1-2.3: Product: USB WLAN Aug 3 12:55:34 cnc-pc kernel: [ 100.544092] usb 1-2.3: Manufacturer: 802.11n Aug 3 12:55:34 cnc-pc kernel: [ 100.544096] usb 1-2.3: SerialNumber: 00e04c000001 Aug 3 12:55:34 cnc-pc kernel: [ 100.545303] rtl8192cu: Chip version 0x11 Aug 3 12:55:34 cnc-pc kernel: [ 100.576483] rtl8192cu: MAC address: 14:cc:20:22:08:6d Aug 3 12:55:34 cnc-pc kernel: [ 100.576493] rtl8192cu: Board Type 0 Aug 3 12:55:34 cnc-pc kernel: [ 100.576592] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 Aug 3 12:55:34 cnc-pc kernel: [ 100.576659] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin Aug 3 12:55:34 cnc-pc mtp-probe: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3" Aug 3 12:55:34 cnc-pc mtp-probe: bus: 1, device: 6 was not an MTP device Aug 3 12:55:35 cnc-pc kernel: [ 101.606903] rtl8192cu 1-2.3:1.0 wlan3: renamed from wlan0 Aug 3 12:55:35 cnc-pc kernel: [ 101.632646] rtl8192cu: MAC auto ON okay! Aug 3 12:55:35 cnc-pc kernel: [ 101.645118] rtl8192cu: Tx queue select: 0x05 Aug 3 12:55:36 cnc-pc kernel: [ 102.846769] wlan3: authenticate with 00:22:75:32:38:77 Aug 3 12:55:36 cnc-pc kernel: [ 102.859202] wlan3: send auth to 00:22:75:32:38:77 (try 1/3) Aug 3 12:55:36 cnc-pc kernel: [ 102.869777] wlan3: authenticated Aug 3 12:55:36 cnc-pc kernel: [ 102.870269] wlan3: associate with 00:22:75:32:38:77 (try 1/3) Aug 3 12:55:36 cnc-pc kernel: [ 102.885426] wlan3: RX AssocResp from 00:22:75:32:38:77 (capab=0x411 status=0 aid=1) Aug 3 12:55:36 cnc-pc kernel: [ 102.885930] wlan3: associated Aug 3 12:55:36 cnc-pc kernel: [ 102.886038] cfg80211: Calling CRDA for country: US Aug 3 12:55:36 cnc-pc kernel: [ 102.891828] cfg80211: Regulatory domain changed to country: US Aug 3 12:55:36 cnc-pc kernel: [ 102.891836] cfg80211: DFS Master region: FCC Aug 3 12:55:36 cnc-pc kernel: [ 102.891839] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Aug 3 12:55:36 cnc-pc kernel: [ 102.891845] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 3000 mBm), (N/A) Aug 3 12:55:36 cnc-pc kernel: [ 102.891851] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 1700 mBm), (N/A) Aug 3 12:55:36 cnc-pc kernel: [ 102.891856] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2300 mBm), (0 s) Aug 3 12:55:36 cnc-pc kernel: [ 102.891861] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 3000 mBm), (N/A) Aug 3 12:55:36 cnc-pc kernel: [ 102.891866] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A) ^C

If i try to install with sudo apt-get install firmware-realtek or firmware-linux-nonfree it says that is already installed and up to date.

on the log i says: rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin and searching for this in google look liker its associated with firmware-realtek ( packages.debian.org/wheezy-backports/firmware-realtek )

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10 years 2 months ago #78325 by ArcEye
Replied by ArcEye on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
rtl8192 is a pretty standard and well supported chip.
You seem have all the modules and firmware required.

I would be interested to see what gets posted in /var/log/messages and /var/log/dmesg when you have a problem with it.
Once you have the problem, go to a terminal and do

cat /var/log/messages > messages.txt
and
dmesg > dmesg.txt

and attach those txt files.

I am a little puzzled as to why the stick is coming up as wlan3.
That would suggest there are 3 previously assigned wireless lan connections in existence.

Please do in a terminal

cat /etc/network/interfaces > interfaces.txt

and attach that too.

Need to check which network manager you are using, if you have network-manager package and wicd installed, they conflict and can cause all sorts of problems.

Run
whereis wicd
whereis nmcli

If it finds both, you have potential problems right there.

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10 years 2 months ago #78352 by jtc
Replied by jtc on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
the itnerfaces.txt file:

Attachment not found



Code:
cnc@cnc-pc ~ $ whereis wicd wicd: cnc@cnc-pc ~ $ whereis nmcli nmcli: /usr/bin/nmcli /usr/share/man/man1/nmcli.1.gz


the last thing that i did are update initramfs and install initramfs-tools. but after half an hour or so it freezes again...

I will post the log messages when the problem happens.

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10 years 2 months ago #78356 by ArcEye
Replied by ArcEye on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
OK,

Your interfaces file just refers back to interfaces.d, which is certainly different to how Debian normally sets things up.

I'll wait to see what the logs contain, when you get a drop out on wireless.

There is nothing wrong per se with the modules and firmware, the dongle is being recognised and brought up.
These USB dongles are pretty flaky a lot of the time in my experience.

I tend to always use wicd for a much more reliable wireless connection.

Would be worth trying removing the package network-manager and installing wicd.
Just make sure you keep the dongle plugged in, so that hopefully it will be picked up automatically.

If it doesn't, you can normally use this procedure.
Code:
rfkill list all

If Wireless LAN is shown blocked (soft or hard)
Code:
rfkill unblock wifi

Then
Code:
ip a

which should give something like
Code:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether c0:4a:00:02:bf:d1 brd ff:ff:ff:ff:ff:ff inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::c24a:ff:fe02:bfd1/64 scope link valid_lft forever preferred_lft forever 3: wlan1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000 link/ether 7c:dd:90:25:03:a3 brd ff:ff:ff:ff:ff:ff

Note wlan1 is shown as DOWN
Code:
ip link set wlan1 up

Now check appears in listing
Code:
ifconfig

Which it does
Code:
eth0 Link encap:Ethernet HWaddr c0:4a:00:02:bf:d1 inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::c24a:ff:fe02:bfd1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:289154 errors:0 dropped:0 overruns:0 frame:0 TX packets:183142 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:361719392 (344.9 MiB) TX bytes:18481853 (17.6 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:2228 errors:0 dropped:0 overruns:0 frame:0 TX packets:2228 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:5760967 (5.4 MiB) TX bytes:5760967 (5.4 MiB) wlan1 Link encap:Ethernet HWaddr 7c:dd:90:25:03:a3 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Now check it is receiving and what stations are in range
Code:
iwlist scan

and you get something like this
Code:
lo Interface doesn't support scanning. wlan1 Scan completed : Cell 01 - Address: 30:B5:C2:51:0D:91 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=70/70 Signal level=-35 dBm Encryption key:off ESSID:"TP-LINK_2.4GHz_510D91" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 9 Mb/s; 12 Mb/s; 18 Mb/s Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=000000392050a79a Extra: Last beacon: 18896ms ago IE: Unknown: 001554502D4C494E4B5F322E3447487A5F353130443931 IE: Unknown: 010882848B960C121824 IE: Unknown: 030101 IE: Unknown: 2A0100 IE: Unknown: 32043048606C IE: Unknown: 2D1AEE111BFFFF000000000000000000000000000000000000000000 IE: Unknown: 331AEE111BFFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16010D0000000000000000000000000000000000000000 IE: Unknown: 3416010D0000000000000000000000000000000000000000 IE: Unknown: 4A0E14000A002C01C800140005001900 IE: Unknown: 7F0101 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0900037F01010000FF7F IE: Unknown: DDA70050F204104A0001101044000102103B000103104700100000000000001000000030B5C2510D101021000754502D4C494E4B1023000854442D573939383010240003312E301042000C3330423543323531304439311054000800060050F20400011011001F576972656C657373204475616C2042616E64204D6F64656D20526F75746572100800020086103C000100104900140024E26002000101600000020001600100020001 Cell 02 - Address: 00:1D:AA:B2:7D:60 Channel:6 Frequency:2.437 GHz (Channel 6) Quality=31/70 Signal level=-79 dBm Encryption key:on ESSID:"Banks_Wireless" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s 18 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s Mode:Master Extra:tsf=0000008940cefda0 Extra: Last beacon: 28ms ago IE: Unknown: 000E42616E6B735F576972656C657373 IE: Unknown: 010882848B961224486C IE: Unknown: 030106 IE: Unknown: 2A0100 IE: Unknown: 32040C183060 IE: Unknown: 2D1A6E1017FFFFFF00010000000000000000000000000C0000000000 IE: Unknown: 3D1606070600000000000000000000000000000000000000 IE: Unknown: 3E0100 IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00 IE: Unknown: 0B050005107A12 IE: Unknown: 7F0101 IE: Unknown: DD07000C4304000000 IE: Unknown: DD1E00904C336E1017FFFFFF00010000000000000000000000000C0000000000 IE: Unknown: DD1A00904C3406070600000000000000000000000000000000000000 IE: Unknown: DD9D0050F204104A0001101044000101103B00010310470010BC329E001DD811B28601001DAAB27D601021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000952616C696E6B415053100800020084103C000100 Cell 03 - Address: BC:F6:85:AD:3A:B9 Channel:2 Frequency:2.417 GHz (Channel 2) Quality=33/70 Signal level=-77 dBm Encryption key:on ESSID:"TALKTALK-AD3AB9" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s 18 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s Mode:Master Extra:tsf=0000002349c3c10f Extra: Last beacon: 1308ms ago IE: Unknown: 000F54414C4B54414C4B2D414433414239 IE: Unknown: 010882848B961224486C IE: Unknown: 030102 IE: Unknown: 32040C183060 IE: Unknown: 0706545720010B14 IE: Unknown: 33082001020304050607 IE: Unknown: 33082105060708090A0B IE: Unknown: DD270050F204104A000110104400010210470010BC329E001DD811B28601BCF685AD3AB9103C000100 IE: Unknown: 050400010000 IE: Unknown: 2A0104 IE: Unknown: 2D1A0C0117FF000000000000000000000000000000000C0000000000 IE: Unknown: 3D1602000700000000000000000000000000000000000000 IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00 IE: Unknown: 0B0500020D7A12 IE: Unknown: DD1E00904C330C0117FF000000000000000000000000000000000C0000000000 IE: Unknown: DD1A00904C3402000700000000000000000000000000000000000000 IE: Unknown: DD07000C4304000000 eth0 Interface doesn't support scanning.

Now you can open up wicd and click on the right hand drop menu [V]

Attachment not found



Select 'Preferences', get this menu and add your WLAN desigination, in this case wlan1.

Attachment not found



Then click OK and return to main dialog and click [Refresh], after which those stations you detected should come up and you are up and running once you select one of them and sort out password etc.

Attachment not found



Note the strength of first station is 72%
That was 3ft from the router! Just shows how flaky these dongles are, my laptop gets 100% anywhere in visible range and 85% 15 metres away, behind 3 brick walls.

regards

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10 years 2 months ago #78367 by jtc
Replied by jtc on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
Thank you for your detailed work. I will check this when the next time when I am on that PC.

there is the messages:

Attachment not found




and dmesg:


Attachment not found





Im already working on an alternative with Debian wheezy, and today when I tryed to optimize the latency times with "grub" options I already have a similar problem on wheezy

this is the "stock" wheezy configuration:
Code:
linux /boot/vmlinuz-3.2.0-4-rt-686-pae root=UUID=2948b065-03bb-46c6-b847-4b6f0dd70d76 ro initrd=/install/gtk/initrd.gz lapic quiet rootdelay=5

this is the LMDE2 configuration that had problems:
Code:
linux /boot/vmlinuz-3.18.13-rt10mah+ root=UUID=34501974-505a-490f-873f-4937e569da86 ro quiet splash isolcpus=2,3 intel_idle.max_cstate=0 processor.max_cstate=0

the modified wheezy configuration where I lost wifi connection to:
Code:
linux /boot/vmlinuz-3.2.0-4-rt-686-pae root=UUID=2948b065-03bb-46c6-b847-4b6f0dd70d76 ro initrd=/install/gtk/initrd.gz quiet splash isolcpus=2,3 intel_idle.max_cstate=0 processor.max_cstate=0 rootdelay=5

after this I remove :
Code:
intel_idle.max_cstate=0 processor.max_cstate=0

from this configuration and the wifi connection seems to be stable (needs more test).

can it be related in somehow with the wifi problems??


tnks

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10 years 2 months ago #78379 by ArcEye
Replied by ArcEye on topic LMDE2 internet conn fail with 3.18.13-rt10mah+

this is the LMDE2 configuration that had problems:

linux /boot/vmlinuz-3.18.13-rt10mah+ root=UUID=34501974-505a-490f-873f-4937e569da86 ro quiet splash isolcpus=2,3 intel_idle.max_cstate=0 processor.max_cstate=0


If you google intel_idle.max_cstate=0 you will find lots of references to problems with networking, especially wifi.

There is some suggestion that using state 1 is a better option, but I have never bothered with these options and turn off all power management, turn fan speed to full etc in BIOS
I always disable suspend, hibernate etc at kernel level for the same reason (when I build the kernel - not through params)

I wish you had said exactly what you were doing in the beginning, these kernel parameters look like the problem, not the kernel itself.
You don't need brilliant latency to run with mesa cards, 50K is quite good enough.

You can quite often improve latency considerably on a multicore newer computer with larger processor caches, by running a dummy base thread at about 25 - 50us with nothing attached to it. Keeps the cores busy so the rt code remains in one cache.

Try it with latency-test 25us 1ms to test it out and look at the servo figures

The USB stick seems to be erroring and repeatedly connecting and disconnecting in the dmesg, but not looked at it very much in light of the preceding.
Code:
[ 3518.517107] rtl_usb:_usb_tx_post():<0-0> Urb has error status 0xFFFFFFB9 [ 3518.517152] rtl_usb:_usb_tx_post():<0-0> Urb has error status 0xFFFFFFB9 [ 3518.685108] usb 1-2.3: USB disconnect, device number 4 [ 3518.699454] rtl_usb: reg 0x102, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x83040002 [ 3518.699468] rtl_usb: reg 0x422, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x0 [ 3518.699480] rtl_usb: reg 0x542, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x4d5 [ 3518.699496] rtl8192cu:rtl92cu_get_hw_reg():<0-0> switch case not processed [ 3518.699531] rtl_usb: reg 0x102, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x3902b2a


Get rid of the kernel params and it should be fine

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10 years 2 months ago #78394 by jtc
Replied by jtc on topic LMDE2 internet conn fail with 3.18.13-rt10mah+
today I tested without theses options on grub, and the problem persists...

I uninstalled network-manager but have errors installing wicd. so I believe that I'm stuck with no way to connect to the internet. Tomorrow I will decide if worth keeping try to fix that or just simply migrate to wheezy (this work is already done).

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10 years 2 months ago #78414 by ArcEye
Replied by ArcEye on topic LMDE2 internet conn fail with 3.18.13-rt10mah+

I uninstalled network-manager but have errors installing wicd. so I believe that I'm stuck with no way to connect to the internet


Without knowing what the errors are, can't assist. To revert just un-install wicd and re-install network-manager.
If the packages are still in /var/cache/apt/archives you don't need a network connection to do that.

Tomorrow I will decide if worth keeping try to fix that or just simply migrate to wheezy (this work is already done).


If wheezy is an option, just use the stock debian rt-preempt kernel, it works perfectly well

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