UEFI boot ends up with black screen (regression)

[Alexco]

While retesting another issue, I found that with current hrev55956 the UEFI boot ends up with a black screen, no boot menu, no logo, no loader, just black. And it hangs here forever.

I always use the UEFI loader of R1/beta3, so I don't know since when this happens. For system information, I attached the syslog of a successful boot with UEFI R1/beta3 boot loader.

[Alexco]

successful boot with beta3

[korli]

Weird successful log though:

KERN: app_server: Finding best mode for 1024x768 (8, 60 Hz, strict) failed
KERN: app_server: Finding best mode for 800x600 (8, 60 Hz) failed
KERN: app_server: Use 1712x1060 (8) instead.

[korli]

Looks like an untested Radeon Model: ​https://cgit.haiku-os.org/haiku/commit/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp?id=b9b2a1dcd2d36f3872d5c3d65fb2ae590a63cba1

You can disable radeon_hd and it should boot with the framebuffer.

[Alexco]

Yes, it does boot with disabled radeon_hd all the time, just not with the new .efi loader. Boot stops directly and screen stays black, before any part of Haiku is even loaded, or config files can be parsed.

[korli]

can you check with a usb disk with an nightly anyboot image?

[Alexco]

Tried that with a USB disk with hrev55956, same result. Instant black screen, no further output or any other activities, system hangs. Pressing the power button briefly powers system down instantly.

No idea how to debug that any further.

[korli]

you can bisect with ​https://download.haiku-os.org/nightly-images/x86_64/

[Alexco]

I don't know what exactly you mean with bisect, but I tried to narrow it down. The last working nightly is hrev55295. Next hrev55299 ends up in black screen.

[korli]

Thanks. Bisection: ​https://en.wikipedia.org/wiki/Bisection_(software_engineering)

Seems the culprit is hrev55297

[waddlesplash]

Any chance this machine has a serial out?

Did you try spamming spacebar to enter the boot menu?

[korli]

must be a duplicate of #17375

[waddlesplash]

How? That version works on this hardware...

[korli]

See https://dev.haiku-os.org/ticket/17375#comment:4

[Alexco]

Replying to waddlesplash:

Any chance this machine has a serial out?

Did you try spamming spacebar to enter the boot menu?

No, sorry, no serial port on this one. Spamming spacebar also has no effect. Is there some kind of debug version or an option which can be used while starting from the UEFI shell?

[pulkomandy]

Marking as blocker as it's a non-booting system regression.

[jessicah]

Fixed in hrev56167.