SD Overclock = Kernel Panic
navi87 last edited by
Pi Model 2b+
Power Supply used: Official Pi
RetroPie Version Used: 4.5
Built From: Pre made SD Image on RetroPie website 4.5
USB Devices connected: Bluteooth Dongle
Controller used: PS4 via Blutetooth
Error messages received: "kernel panic-not syncing: vfs: unable to mount root fs on unknown-block(179,2)"
How to replicate the problem:
Inserting "dtparam=sd_overclock=100" into config.txt
Ive been trying to overclock my SD card (32gb Samsung Evo Plus) but after editing the config.txt I get the kernel panic message.
I did try to fix this by changing the cmdline.txt file and editing the root directory as suggested by JonnyKesh on this thread:
But that just change the error message from "unknown-block(179,2)" to "unknown-block(179,6)"
Once I remove the overclock line in the config.txt I am able to boot , the SD card is fine.
Is this overclock even possible on the Pi 2b+? I have seen guides which mentions it is for all the Pi's but all the threads I found on this subject seem to be Pi 3 users.
try a lower overclock, like 83?
navi87 last edited by
Yeah I tried that out too, I thought I was pushing it too hard as well but I got the same result.
backstander last edited by
Try this instead:
Cesarpuig last edited by
I had a problem similar to yours on a Raspberry Pi 3B. I solved it by decreasing the overclock I had done to the CPU, GPU and RAM. Not only did I have problems with the SD Overclock, but I also had some type of return castle of Wolfesteim game.
With this overclock I had the same problem as you:
#uncomment to overclock the arm. 700 MHz is the default. arm_freq=1400 over_voltage=6 gpu_freq=550 core_freq=550 sdram_freq=550 sdram_schmoo=0x02000020 over_voltage_sdram_p=6 over_voltage_sdram_i=4 over_voltage_sdram_c=4 #uncomment to increased the sdcard reader speed (No default) dtparam=sd_overclock=100
And so solve it:
#uncomment to overclock the arm. 700 MHz is the default. arm_freq=1400 over_voltage=6 gpu_freq=525 core_freq=525 sdram_freq=550 sdram_schmoo=0x02000020 over_voltage_sdram_p=6 over_voltage_sdram_i=4 over_voltage_sdram_c=4 #uncomment to increased the sdcard reader speed (No default) dtparam=sd_overclock=100
navi87 last edited by navi87
@backstander I tried that didnt work as well. I have a feeling my SD card just isnt upto scratch.
I got myself a Pi 4b now with a 64GB micro sd card, the "dtparam=sd_overclock=100" and it works fine. Consider this case closed, cheers for all the input though guys :)