RT-AC68U keep crashing

[Guibs]

Hi Guys,

New here, Just bought 3 days ago my first Asus router (RT-Ac68U) replaying a cisco/linksys E4200.

Started having issues today, the entire network goes down multiple time in the day. Wireless is down. Even local wired network. The Router does not response to ping anymore. Only way to fix this is to restart the router.

I wanted to post some logs but I am restricted by the size of this post. If someone want something specific, please let me know.

Any idea? I am using Merlin's 3.0.0.4.374.43_2 firmware.

 

[Guibs]

Here is what I had in logs before the crash

Jul 28 05:54:02 kernel: Modules linked in: tun ohci_hcd ehci_hcd xhci_hcd nf_nat_sip nf_conntrack_sip nf_nat_h323 nf_conntrack_h323 nf_nat_rtsp nf_conntrack_rtsp nf_nat_ftp nf_conntrack_ftp ip6table_filter ip6table_mangle sr_mod cdrom cdc_mbim qmi_wwan cdc_wdm cdc_ncm rndis_host cdc_ether asix usbnet mii usblp ufsd(P) jnl ext2 ext4 jbd2 crc16 ext3 jbd mbcache usb_storage sg sd_mod scsi_wait_scan scsi_mod usbcore jffs2 zlib_deflate nf_nat_pptp nf_conntrack_pptp nf_nat_proto_gre nf_conntrack_proto_gre wl(
Jul 28 05:54:02 kernel: [<c0043ff8>] (unwind_backtrace+0x0/0xf8) from [<c02dc2e4>] (schedule+0x434/0x75c)
Jul 28 05:54:02 kernel: [<c02dc2e4>] (schedule+0x434/0x75c) from [<c005b994>] (__cond_resched+0x24/0x34)
Jul 28 05:54:02 kernel: [<c005b994>] (__cond_resched+0x24/0x34) from [<c005b9f0>] (__cond_resched_lock+0x4c/0x90)
Jul 28 05:54:02 kernel: [<c005b9f0>] (__cond_resched_lock+0x4c/0x90) from [<c00d9ec8>] (__shrink_dcache_sb+0xe8/0x324)
Jul 28 05:54:02 kernel: [<c00d9ec8>] (__shrink_dcache_sb+0xe8/0x324) from [<c00da25c>] (shrink_dcache_memory+0x14c/0x1d8)
Jul 28 05:54:02 kernel: [<c00da25c>] (shrink_dcache_memory+0x14c/0x1d8) from [<c00a1ff0>] (shrink_slab+0x10c/0x170)
Jul 28 05:54:02 kernel: [<c00a1ff0>] (shrink_slab+0x10c/0x170) from [<c00a437c>] (try_to_free_pages+0x1dc/0x33c)
Jul 28 05:54:02 kernel: [<c00a437c>] (try_to_free_pages+0x1dc/0x33c) from [<c009dc30>] (__alloc_pages_nodemask+0x31c/0x698)
Jul 28 05:54:02 kernel: [<c009dc30>] (__alloc_pages_nodemask+0x31c/0x698) from [<c0388d24>] (__slab_alloc+0x1b4/0x814)
Jul 28 05:54:02 kernel: [<c0388d24>] (__slab_alloc+0x1b4/0x814) from [<c00c38b0>] (__kmalloc+0xf4/0x104)
Jul 28 05:54:02 kernel: [<c00c38b0>] (__kmalloc+0xf4/0x104) from [<c01c0af4>] (_nflash_mtd_read+0x9c/0x3a0)
Jul 28 05:54:02 kernel: [<c01c0af4>] (_nflash_mtd_read+0x9c/0x3a0) from [<c01c12dc>] (nflash_mtd_read+0x4c/0x64)
Jul 28 05:54:02 kernel: [<c01c12dc>] (nflash_mtd_read+0x4c/0x64) from [<c01a3f94>] (part_read+0x64/0xe8)
Jul 28 05:54:02 kernel: [<c01a3f94>] (part_read+0x64/0xe8) from [<c01a71f0>] (mtdblock_readsect+0x40/0x114)
Jul 28 05:54:02 kernel: [<c01a71f0>] (mtdblock_readsect+0x40/0x114) from [<c01a69f0>] (mtd_blktrans_thread+0x204/0x294)
Jul 28 05:54:02 kernel: [<c01a69f0>] (mtd_blktrans_thread+0x204/0x294) from [<c0079e6c>] (kthread+0x88/0x90)
Jul 28 05:54:02 kernel: [<c0079e6c>] (kthread+0x88/0x90) from [<c003eb8c>] (kernel_thread_exit+0x0/0x8)
Jul 28 05:54:02 kernel: BUG: scheduling while atomic: mtdblock3/258/0x40000002
Jul 28 05:54:02 kernel: module: tun bf7d4000 12723
Jul 28 05:54:02 kernel: module: ohci_hcd bf7c9000 19288
Jul 28 05:54:02 kernel: module: ehci_hcd bf7ba000 34220
Jul 28 05:54:02 kernel: module: xhci_hcd bf7a5000 53350
Jul 28 05:54:02 kernel: module: nf_nat_sip bf79e000 5586
Jul 28 05:54:02 kernel: module: nf_conntrack_sip bf792000 16679
Jul 28 05:54:02 kernel: module: nf_nat_h323 bf78b000 5137
Jul 28 05:54:02 kernel: module: nf_conntrack_h323 bf77a000 34844
Jul 28 05:54:02 kernel: module: nf_nat_rtsp bf774000 3400
Jul 28 05:54:02 kernel: module: nf_conntrack_rtsp bf76d000 4268
Jul 28 05:54:02 kernel: module: nf_nat_ftp bf767000 1314
Jul 28 05:54:02 kernel: module: nf_conntrack_ftp bf760000 5131
Jul 28 05:54:02 kernel: module: ip6table_filter bf75a000 893
Jul 28 05:54:02 kernel: module: ip6table_mangle bf754000 1093
Jul 28 05:54:02 kernel: module: sr_mod bf74b000 11507
Jul 28 05:54:02 kernel: module: cdrom bf72d000 33318
Jul 28 05:54:02 kernel: module: cdc_mbim bf727000 3313
Jul 28 05:54:02 kernel: module: qmi_wwan bf71f000 6020
Jul 28 05:54:02 kernel: module: cdc_wdm bf718000 7856
Jul 28 05:54:02 kernel: module: cdc_ncm bf70f000 9258
Jul 28 05:54:02 kernel: module: rndis_host bf708000 5209
Jul 28 05:54:02 kernel: module: cdc_ether bf702000 3456
Jul 28 05:54:02 kernel: module: asix bf6f9000 11741
Jul 28 05:54:02 kernel: module: usbnet bf6ef000 11691
Jul 28 05:54:02 kernel: module: mii bf6e9000 3484
Jul 28 05:54:02 kernel: module: usblp bf6e0000 9386
Jul 28 05:54:02 kernel: module: ufsd bf60b000 595355
Jul 28 05:54:02 kernel: module: jnl bf5fe000 27931
Jul 28 05:54:02 kernel: module: ext2 bf5e8000 55581
Jul 28 05:54:02 kernel: module: ext4 bf59f000 234233
Jul 28 05:54:02 kernel: module: jbd2 bf588000 52386
Jul 28 05:54:02 kernel: module: crc16 bf582000 1081
Jul 28 05:54:02 kernel: module: ext3 bf55b000 113117
Jul 28 05:54:02 kernel: module: jbd bf546000 45524
Jul 28 05:54:02 kernel: module: mbcache bf53e000 5156
Jul 28 05:54:02 kernel: module: usb_storage bf52b000 35319
Jul 28 05:54:02 kernel: module: sg bf51e000 21138
Jul 28 05:54:02 kernel: module: sd_mod bf512000 23159
Jul 28 05:54:02 kernel: module: scsi_wait_scan bf50c000 502
Jul 28 05:54:02 kernel: module: scsi_mod bf4dd000 114857
Jul 28 05:54:02 kernel: module: usbcore bf4b2000 108266
Jul 28 05:54:02 kernel: module: jffs2 bf491000 94871
Jul 28 05:54:02 kernel: module: zlib_deflate bf487000 19990
Jul 28 05:54:02 kernel: module: nf_nat_pptp bf481000 1796
Jul 28 05:54:02 kernel: module: nf_conntrack_pptp bf47b000 3739
Jul 28 05:54:02 kernel: module: nf_nat_proto_gre bf475000 1047
Jul 28 05:54:02 kernel: module: nf_conntrack_proto_gre bf46f000 3499
Jul 28 05:54:02 kernel: module: wl bf037000 3956700
Jul 28 05:54:02 kernel: module: igs bf02d000 12935
Jul 28 05:54:02 kernel: module: emf bf023000 16229
Jul 28 05:54:02 kernel: module: et bf00b000 63892
Jul 28 05:54:02 kernel: module: ctf bf000000 17519
Jul 28 05:54:02 kernel: Modules linked in: tun ohci_hcd ehci_hcd xhci_hcd nf_nat_sip nf_conntrack_sip nf_nat_h323 nf_conntrack_h323 nf_nat_rtsp nf_conntrack_rtsp nf_nat_ftp nf_conntrack_ftp ip6table_filter ip6table_mangle sr_mod cdrom cdc_mbim qmi_wwan cdc_wdm cdc_ncm rndis_host cdc_ether asix usbnet mii usblp ufsd(P) jnl ext2 ext4 jbd2 crc16 ext3 jbd mbcache usb_storage sg sd_mod scsi_wait_scan scsi_mod usbcore jffs2 zlib_deflate nf_nat_pptp nf_conntrack_pptp nf_nat_proto_gre nf_conntrack_proto_gre wl(
Jul 28 05:54:02 kernel: [<c0043ff8>] (unwind_backtrace+0x0/0xf8) from [<c02dc2e4>] (schedule+0x434/0x75c)
Jul 28 05:54:02 kernel: [<c02dc2e4>] (schedule+0x434/0x75c) from [<c005b994>] (__cond_resched+0x24/0x34)
Jul 28 05:54:02 kernel: [<c005b994>] (__cond_resched+0x24/0x34) from [<c02dc728>] (_cond_resched+0x34/0x44)
Jul 28 05:54:02 kernel: [<c02dc728>] (_cond_resched+0x34/0x44) from [<c00a1fbc>] (shrink_slab+0xd8/0x170)
Jul 28 05:54:02 kernel: [<c00a1fbc>] (shrink_slab+0xd8/0x170) from [<c00a437c>] (try_to_free_pages+0x1dc/0x33c)
Jul 28 05:54:02 kernel: [<c00a437c>] (try_to_free_pages+0x1dc/0x33c) from [<c009dc30>] (__alloc_pages_nodemask+0x31c/0x698)
Jul 28 05:54:02 kernel: [<c009dc30>] (__alloc_pages_nodemask+0x31c/0x698) from [<c0388d24>] (__slab_alloc+0x1b4/0x814)
Jul 28 05:54:02 kernel: [<c0388d24>] (__slab_alloc+0x1b4/0x814) from [<c00c38b0>] (__kmalloc+0xf4/0x104)
Jul 28 05:54:02 kernel: [<c00c38b0>] (__kmalloc+0xf4/0x104) from [<c01c0af4>] (_nflash_mtd_read+0x9c/0x3a0)
Jul 28 05:54:02 kernel: [<c01c0af4>] (_nflash_mtd_read+0x9c/0x3a0) from [<c01c12dc>] (nflash_mtd_read+0x4c/0x64)
Jul 28 05:54:02 kernel: [<c01c12dc>] (nflash_mtd_read+0x4c/0x64) from [<c01a3f94>] (part_read+0x64/0xe8)
Jul 28 05:54:02 kernel: [<c01a3f94>] (part_read+0x64/0xe8) from [<c01a71f0>] (mtdblock_readsect+0x40/0x114)
Jul 28 05:54:02 kernel: [<c01a71f0>] (mtdblock_readsect+0x40/0x114) from [<c01a69f0>] (mtd_blktrans_thread+0x204/0x294)
Jul 28 05:54:03 kernel: [<c01a69f0>] (mtd_blktrans_thread+0x204/0x294) from [<c0079e6c>] (kthread+0x88/0x90)
Jul 28 05:54:03 kernel: [<c0079e6c>] (kthread+0x88/0x90) from [<c003eb8c>] (kernel_thread_exit+0x0/0x8)

 

[hggomes]

Reset your router via hardware, press reset button 10s and then release it, the router will reboot after, then go to FW GUI and do a Factory Default:

http://192.168.1.1/Advanced_SettingBackup_Content.asp

Test your router again, if you notice the same behaviour then try to flash it with latest FW available:

http://198.23.248.102/AC68U/RT-AC68U_Latest.trx

Flash it this way:

1. Power OFF the router.
2. Press reset button without releasing and power it ON until you see the power led blincking.
3. Go to http://192.168.1.1 (Bootloader recovery) and press Clear NVRAM option and then select the latest FW file and upload it.
4. Wait until you receive a message that is done and wait for router reboot itself, it could take some time be pacient.
5. Do a factory default again via ASUS FW GUI and check if you are on the latest/new version installed.
6. Power cycle the router.
7. Test the router once again.

If it works then GREAT, otherway you have some HW issue on your router.

Good luck!

 

[RMerlin]

The error seems to occur while reading from flash. Try reflashing it a second time just in case. If it still fails, then you might have a defective device - I would recommend getting it replaced.

 

[Guibs]

The error seems to occur while reading from flash. Try reflashing it a second time just in case. If it still fails, then you might have a defective device - I would recommend getting it replaced.

Thanks for the reply hggomes and Merlin.

How do you "reflash" ? You mean, just reinstall the firmware again?

The only change I did to the router when I got it to install your firmware and I did telnet to it to do the changes on the command line that you recommand for 5Ghz and appel products (we have several iphone, ipod, ipad at home) and notice a bit of delay when they were connected to the 5Ghz band. I did that on the first day and the router was solid for 2 days before starting the problems today.

 

[hggomes]

Read my post and reset or reflash the router again.

 

[Guibs]

Read my post and reset or reflash the router again.

Thanks, Followed the procedure but the only part I could not complete was the Clear NVRAM part. I've powered back on while holding the RESET bouton down until the power light would start to flash. but it kept flashing and the router would not be accessible. I waited 10 minutes and I still couldn't connect to the router so I restarted it and continued the procedure.

I'm am now running 376.44_beta2 and will keep you posted.

as I said before, In one of the sticky, I ended up applying the changes regarding apple support with 5GHZ

nvram set wl0_reg_mode=h
nvram set wl1_reg_mode=h
nvram commit
reboot

Should I go ahead with this or wait? What exactly does this change does? as I said, on the wifi side, it's mostly used for wifi products right now (ipad, iphons, ipods) so I need to make sure it works well with them.

Also, I should report that in the beta post but lots of spelling mistake in the french version of your build. I think mostly all the accent are missing so all the "é" are removed. Also possibly font should be made smaller in french since words are usually longer and some wrapping happens. Eric should look into it.

finally, I'm running your newer beta and I'm getting speed performance drop. I'm espicially talking about internet speed, even on a computer "wired" to the router so no wireless involved. Ping to my ISP is higher and for the first time, on a wired line, I'm not getting my full download and upload speed.

 

[hggomes]

Have you configured your router manually after installed Beta2 / Factory default? Or you have used old config file?

You should test it after a manual config.

 

[Guibs]

Redone all configurations manually.

Speed gone up a bit but still about 4mb slower on download and about 2 mob slower on upload.

 

[hggomes]

You probably cannot blame router for that, what kind of connection? Speed?

Does the line being used somehow on other client?

 

[RMerlin]

Too many variables. You shouldn't troubleshoot a new router by running beta firmwares on it, to be honest. Especially not bleeding edge code from the Git repo.