A1 WiFi Reboot - Gathering Data [ Edited ]

[sinanju]

I'd like to get a bug report submitted for the wifi-related reboot many have been suffering from.  If you've experienced this issue, please try to explain the circumstances of it as best you can.

If Lenovo recognizes a problem as pervasive, a reaction mechanism they call a "Wind Chill" kicks in and more folks, deeper in the organization get involved.  If, as I suspect, the issue pervasive, gathering the input into one place may make it more obvious.  This, apparently, has happened with the GPS issue.  Once there's enough data, I'll submit a bug over at code.google.com, post it in the reported bugs thread, and we can start voting it up. 

I'll start:

If I have WiFi sleep policy set to always on and manage the wifi state myself with the Beautiful Widgets WiFi toggle, I don't crashes.  I do get crashes if:

• WiFi sleep policy is set to sleep after 15 minutes or never while plugged in
• I turn off the tablet
• Wait a few minutes

At that point, I'll often see the Lenovo logo pop up after a few minutes due to a reboot.  Once running again, in at least two circumstances, I've started seeing Force Close messages from android.process.acore. The only way I've been able to get rid of that is by restoring the tablet from backup.  Googling that issue suggests its a Contacts sync issue -- perhaps the crash caused corruption -- and if I see it again, I'll try clearing my contacts database and resyncing it.

I think I've also experienced one crash when manually managing the state when I turned off WiFi and also turned off the screen before WiFi was fully down.

Please post your experiences.

[sinanju]

If your tablet is rooted, you can grab a copy of /proc/last_kmsg after a reboot from a crash.  Here's one from my most recent crash:

[sinanju]

I called support on this and they want to RMA my tablet.  I suggested that other folks have been having this issue, but the support person I spoke to says its the first they've heard of it. 

If you're having this problem, you need to call support and report it.  +1 877 453 6686

[tinybeetle]

---

sinanju wrote:

I called support on this and they want to RMA my tablet.  I suggested that other folks have been having this issue, but the support person I spoke to says its the first they've heard of it. 

If you're having this problem, you need to call support and report it.  +1 877 453 6686

---

Unbelievable, calling now.

[sinanju]

I posted a link to a bug report @ code.google.com in the central bug thread.  Here's that link: Issue 24745

[sinanju]

If you can grab the contents of /proc/last_kmsg, perhaps we can compare notes.  Your comments in the bug report may point to another error.  That said, changes in the power status do, through the WiFi sleep policy, cause changes in the WiFi status. Here's where things start to go south in my crash:

dhd_prot_attach: kmalloc failed
dhd_prot_attach failed
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 817 [#1] PREEMPT
last sysfs file: /sys/devices/platform/rfkill-fxn/rfkill/rfkill0/state
Modules linked in: dhd(+) [last unloaded: dhd]

dhd_prot_attach is part of the Broadcom 802.11 driver.  The driver appears to be a backport -- perhaps a bad one.  We have kernel version 2.6.35, but this suggests it became part of the kernel at 2.6.37: Link