I can't seem to get a video signal output to my monitor. Here is all my information: System information Firmware version: 9.60 Model: CUH2002A Type: Slim Storage: 500GB SSD Southbridge Baikal B1 (0x30201) Jailbreak information Exploit: PPPwn-Luckfox v1.2.7 (internally soldered to rj45) GoldHen: v2.4b18.6 Linux information Using sandisk 256GB USB 3.0 SSD Initramfs: Using the external storage initramfs from moddedwarfare description Kernel: 5.4.247-baikal-dfaus -- BAIKAL – Blackscreen Fix, MediaTek 7668 Support Boot args (same from the kernel release) Payload: Using the the 9.60 payload (1GB for install) from ps4-linux-payloads Distro: CachyOS by elokuba Other information Loading payloads via FTP Using the Payload Guest homebrew application Description of error After loading the 1GB payload, I get the message to say its loading OtherOS. The monitor then loses signal and switches to my other inputs. The light on the PS4 goes blue and pulses to purple (I think). I've tried unplugging the HDMI and also switching tty sessions but no luck. I think I was able to actually install the distro though, because I connected a keyboard and executed install-psxitarch.sh then enter 100, after some time I unplugged the external ssd and could see a distro was installed on it. I would appreciate any advice to get a graphical output. Thanks!

Baikal PS4 slim no signal after loading Linux payload

sudsy

I can't seem to get a video signal output to my monitor. Here is all my information:

System information

Firmware version: 9.60
Model: CUH2002A
Type: Slim
Storage: 500GB SSD
Southbridge Baikal B1 (0x30201)

Jailbreak information

Exploit: PPPwn-Luckfox v1.2.7 (internally soldered to rj45)
GoldHen: v2.4b18.6

Linux information

Using sandisk 256GB USB 3.0 SSD
Initramfs: Using the external storage initramfs from moddedwarfare description
Kernel: 5.4.247-baikal-dfaus -- BAIKAL – Blackscreen Fix, MediaTek 7668 Support
Boot args (same from the kernel release)
Payload: Using the the 9.60 payload (1GB for install) from ps4-linux-payloads
Distro: CachyOS by elokuba

Other information

Loading payloads via FTP
Using the Payload Guest homebrew application

Description of error
After loading the 1GB payload, I get the message to say its loading OtherOS. The monitor then loses signal and switches to my other inputs.

The light on the PS4 goes blue and pulses to purple (I think). I've tried unplugging the HDMI and also switching tty sessions but no luck.

I think I was able to actually install the distro though, because I connected a keyboard and executed install-psxitarch.sh then enter 100, after some time I unplugged the external ssd and could see a distro was installed on it.

I would appreciate any advice to get a graphical output. Thanks!

noob404

Try the alternate method to install the distro. This will guarantee the distro is installed. Then, see if you still get the blackscreen after trying everything out. BTW, also confirm if the screen turns completely black after the payload is loaded or if you do see the shell and the initial boot log for the Linux distro in the beginning.

sudsy

noob404 I definitely get no rescue shell output to my monitor. Once I load the payload, the monitor loses HDMI signal and that's it. However I could install CachyOS (seemingly) by typing the necessary commands. After unplugging my external SSD I could see a linux filesystem was created on it.

I will try alternative method

sudsy

noob404 I did the alternate install but still no display signal. PS4 light goes blue/blinks to white or purple I cant really tell

noob404

sudsy Do you have another monitor or TV you could test on?

sudsy

noob404 Thanks I tried this on my tv and it worked! Although, overscaling is an issue now.
I suspect my monitor may have been trying to force a specific refresh rate or another parameter that the kernel couldn't handle.

wqandrade

The same thing happens to me. But I have a Belize and did not try to install linux.

No monitor after the payload.

Random-Kafk

Nice.. Yes, in general the PS4 Linux kernels are better supported on TVs than monitors.

I think it's because they support a larger variety of display modes usually not utilized on monitors, and their HDMI connection is slightly different.

The kernel you used, and these ones in general use 1920x1080 with 60 Hz. Does your monitor support 60 Hz? or does it use something higher by default? sudsy

Which kernel and monitor setup is causing your no signal wqandrade ? You may try adding a bootargs.txt if you're on 5.x.

sudsy

Random-Kafk Hi i'm using 5.4.247-baikal-dfaus kernel. My monitor is an MSI MP273A. I think by default it tries to lock in at 100Hz whereas my tv is 60Hz.

I also fixed my overscaling issue by forcing full RGB in the PS4 settings

Random-Kafk

sudsy Thanks for the input! Yeah one of the problems with current PS4 Linux kernels is that they use a set of predefined display modes that are generally supported on PS4s (usually it's just 1080p@60Hz that's allowed).

We don't probe the monitors for their specifics and compatibilities before outputting this image, as we don't use the EDID information from the HDMI (no one has found a way yet through the kernel).

ps4boot/ps4gentoo on Github (mircoho) has made their exploit page properly copy the display EDID from PS4's Orbis OS, and available for Linux, but you need to use a modified initramfs that makes use of it. mircoho's initramfs does that, but I think it's still a WIP? and unreleased (though it's easy enough to modify the initramfs).

That is a good fix for this issue, I think especially for differing refresh rates, but I think you still need a kernel with some changes to prevent a blackscreen (as opposed to the "No signal") later on. Some testing will elucidate the matter.

You may try the mentioned setup in case you're trying to fix the display on your monitor.