S4 i9505 SIM card not detected

[bitterman1970]

Have tried the last 2 builds, 1009 and 1013 and in both cases I'm getting a sim card not detected error. I've tried the latest Cyanogenmod nightly build with no issues with the sim card.

[thestinger]

There was a similar issue in the past due to missing firmware, but I thought it was dealt with. Does wifi work for you?

[thestinger]

There was a similar issue in the past due to missing firmware, but I thought it was dealt with. Does wifi work for you?

[bitterman1970]

Yep, wifi is absolutely fine

[bitterman1970]

Yep, wifi is absolutely fine

[thestinger]

Can you try the oldest build that's published?

[thestinger]

Can you try the oldest build that's published?

[bitterman1970]

Will try with the oldest build I can see, 1002

[bitterman1970]

Will try with the oldest build I can see, 1002

[thestinger]

The old problem that's now fixed also caused the Baseband version entry in Settings -> About phone to appear as Unknown instead of listing the version. That's worth checking.

[thestinger]

The old problem that's now fixed also caused the Baseband version entry in Settings -> About phone to appear as Unknown instead of listing the version. That's worth checking.

[thestinger]

That part works for me on the latest build but I'll need to check out the SIM card issue.

[thestinger]

That part works for me on the latest build but I'll need to check out the SIM card issue.

[bitterman1970]

First thing I did was compare the baseband on the Cyanogenmod build and the 1013 Copperhead build and they were the same

[bitterman1970]

First thing I did was compare the baseband on the Cyanogenmod build and the 1013 Copperhead build and they were the same

[thestinger]

One easy thing to try would be enabling PaX soft mode in Settings -> Developer settings and rebooting (needs to be unlocked by repeatedly clicking on the build information in About phone). I don't think that's the issue though.

It would be helpful if you could provide the logs from adb logcat.

[thestinger]

One easy thing to try would be enabling PaX soft mode in Settings -> Developer settings and rebooting (needs to be unlocked by repeatedly clicking on the build information in About phone). I don't think that's the issue though.

It would be helpful if you could provide the logs from adb logcat.

[bitterman1970]

Okay, going to try the 1002 build in a while, will also try to get the logs.... Although I'm a bit of a noob moron at this stuff lol

[bitterman1970]

Okay, going to try the 1002 build in a while, will also try to get the logs.... Although I'm a bit of a noob moron at this stuff lol

[thestinger]

No problem. I'm just very eager to fix it. I use a Nexus 5 as my main device so the SIM card features on the S4 don't get tested much. It's possible it broke everywhere, but I'd expect that someone would have told me by now. It's more likely that there's a problem specific to the radio in some regions.

[thestinger]

No problem. I'm just very eager to fix it. I use a Nexus 5 as my main device so the SIM card features on the S4 don't get tested much. It's possible it broke everywhere, but I'd expect that someone would have told me by now. It's more likely that there's a problem specific to the radio in some regions.

[bitterman1970]

OK, tried 1002 build, same issue...... Will try to get logs tomorrow and I'll get them off to you.

[bitterman1970]

OK, tried 1002 build, same issue...... Will try to get logs tomorrow and I'll get them off to you.

[bitterman1970]

Trying to attach logcat.txt but not being allowed to...any other way i can get it to you?

[bitterman1970]

Trying to attach logcat.txt but not being allowed to...any other way i can get it to you?

[thestinger]

You can email it to daniel.micay@copperhead.co.

[thestinger]

You can email it to daniel.micay@copperhead.co.

[bitterman1970]

Email sent

[bitterman1970]

Email sent

[thestinger]

Okay, got it. I'll look into it in a bit.

[thestinger]

Okay, got it. I'll look into it in a bit.

[bitterman1970]

First time I've ever used logcat, so I hope it was of some use.

[bitterman1970]

First time I've ever used logcat, so I hope it was of some use.

[bitterman1970]

As I said, I went back to build 1002 and was still getting the same issue...

[bitterman1970]

As I said, I went back to build 1002 and was still getting the same issue...

[thestinger]

Yeah, the logs pointed me in the right direction but I can replicate the problem locally so I can get anything I need here.

[thestinger]

Yeah, the logs pointed me in the right direction but I can replicate the problem locally so I can get anything I need here.

[bitterman1970]

I hope you're able to find a solution to this glitch soon :)

[bitterman1970]

I hope you're able to find a solution to this glitch soon :)

[thestinger]

I got this to work by reverting a bunch of changes, just need to narrow it down to one specific feature now.

[thestinger]

I got this to work by reverting a bunch of changes, just need to narrow it down to one specific feature now.

[thestinger]

And... now it's not working. I guess I need to start by building vanilla CyanogenMod. I wonder if this is another case where their public build instructions, etc. do not result in a working build.

[thestinger]

And... now it's not working. I guess I need to start by building vanilla CyanogenMod. I wonder if this is another case where their public build instructions, etc. do not result in a working build.

[thestinger]

Still narrowing this down, just takes a really long time to do builds.

[thestinger]

Still narrowing this down, just takes a really long time to do builds.

[bitterman1970]

No worries, looking forward to testing ;)

[bitterman1970]

No worries, looking forward to testing ;)

[thestinger]

On the positive side, I have it narrowed down to the Bionic changes. Just need to figure out which, and then why it happens. Hoping it's an obvious issue like a simple memory corruption case detected by OpenBSD malloc.

[thestinger]

On the positive side, I have it narrowed down to the Bionic changes. Just need to figure out which, and then why it happens. Hoping it's an obvious issue like a simple memory corruption case detected by OpenBSD malloc.

[thestinger]

It's definitely caused by OpenBSD malloc, but it's unclear what goes wrong. There are no obvious related errors in the logs and seemingly no crashes. Hm...

[thestinger]

It's definitely caused by OpenBSD malloc, but it's unclear what goes wrong. There are no obvious related errors in the logs and seemingly no crashes. Hm...

[thestinger]

Finally narrowed this down. It's a use-after-free bug in Samsung's proprietary rild daemon. The OpenBSD malloc junk filling feature breaks it and it manages to not crash or print any error message. The Freeguard feature actually triggers a proper crash on the use-after-free. I'll include an ugly workaround for this in the next ROM (disabling junk filling for /system/bin/rild on the S4 - no impact to other devices or other processes on the S4).

[thestinger]

Finally narrowed this down. It's a use-after-free bug in Samsung's proprietary rild daemon. The OpenBSD malloc junk filling feature breaks it and it manages to not crash or print any error message. The Freeguard feature actually triggers a proper crash on the use-after-free. I'll include an ugly workaround for this in the next ROM (disabling junk filling for /system/bin/rild on the S4 - no impact to other devices or other processes on the S4).

[thestinger]

AFAICT this is fully worked around and will be included in the next ROM (doing a clean build right now).

[thestinger]

AFAICT this is fully worked around and will be included in the next ROM (doing a clean build right now).

[bitterman1970]

Will test this out asap and get back to you

[bitterman1970]

Will test this out asap and get back to you

[thestinger]

The 20151019 build is now published with the fix for this.

[thestinger]

The 20151019 build is now published with the fix for this.

[bitterman1970]

Tried new build, no baseband now.......hang on ,restarted twice, baseband now detected....

[bitterman1970]

Tried new build, no baseband now.......hang on ,restarted twice, baseband now detected....

[bitterman1970]

looking ok now

[bitterman1970]

looking ok now