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Occasionally, I2C1 is not working correctly. Audio under Linux wont work when uBoot message says:
...
i2c: I2C1 SDA is low, start i2c recovery...
I2C1 Recovery failed, I2C1 SDA still low!!!
...
This is probably the realtek driver issue. The problem can be reproduced when a large ping is used:
# ping -s 1000 192.168.0.86
This is how the problem looks (use 'dmesg' to see it):
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x284/0x2a8()
NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
Modules linked in:
[<8004ae34>] (unwind_backtrace+0x0/0xf8) from [<80078b9c>] (warn_slowpath_common+0x4c/0x64)
[<80078b9c>] (warn_slowpath_common+0x4c/0x64) from [<80078c48>] (warn_slowpath_fmt+0x30/0x40)
[<80078c48>] (warn_slowpath_fmt+0x30/0x40) from [<80457bb0>] (dev_watchdog+0x284/0x2a8)
[<80457bb0>] (dev_watchdog+0x284/0x2a8) from [<800843c0>] (run_timer_softirq+0xec/0x214)
[<800843c0>] (run_timer_softirq+0xec/0x214) from [<8007e4b4>] (__do_softirq+0xac/0x140)
[<8007e4b4>] (__do_softirq+0xac/0x140) from [<8007e9f0>] (irq_exit+0x94/0x9c)
[<8007e9f0>] (irq_exit+0x94/0x9c) from [<8003e2e0>] (do_IPI+0x10c/0x17c)
[<8003e2e0>] (do_IPI+0x10c/0x17c) from [<80043a0c>] (__irq_svc+0x4c/0xe8)
Exception stack(0xbff01f90 to 0xbff01fd8)
1f80: 80af79c0 80070093 00000001 00000000
1fa0: bff00000 80af04a4 80aa3a70 8052c948 80aa6f0c 412fc09a 00000000 00000000
1fc0: 00000000 bff01fd8 80052f0c 80044b04 40070013 ffffffff
[<80043a0c>] (__irq_svc+0x4c/0xe8) from [<80044b04>] (default_idle+0x24/0x28)
[<80044b04>] (default_idle+0x24/0x28) from [<80044d20>] (cpu_idle+0xe0/0x124)
[<80044d20>] (cpu_idle+0xe0/0x124) from [<105205b4>] (0x105205b4)
---[ end trace 6cdc652e7b4d2252 ]---
When Phoronix FFmpeg test was installed, during compilation a segmentation fault appeared:
Phoronix Test Suite v4.8.6
To Install: pts/ffmpeg-2.3.0
Determining File Requirements ..........................................
Searching Download Caches ..............................................
1 Test To Install
2 Files To Download [296MB]
353MB Of Disk Space Is Needed
pts/ffmpeg-2.3.0:
Test Installation 1 of 1
2 Files Needed [296 MB / 8 Minutes]
Downloading: ffmpeg-2.1.1.tar.bz2 [6.33MB]
Estimated Download Time: 1m ........................................
Downloading: HD2-h264.ts [290MB]
Estimated Download Time: 6m ........................................
Installation Size: 353 MB
Installing Test @ 09:29:04
The installer exited with a non-zero exit status.
ERROR: libavcodec/ffv1dec.c:221:1: internal compiler error: Segmentation fault
LOG: ~/.phoronix-test-suite/installed-tests/pts/ffmpeg-2.3.0/install-failed.log
If linux boots from SD (there is no ethernet activity in u-boot), than network under linux does not work. If there is ethernet activity in u-boot (ping or tftp) than network under linux works ok.
Probably MAC Address conflict? (similar problem http://lists.denx.de/pipermail/u-boot/2004-August/006790.html)
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