intel_extreme unsupported mode since hrev55991

[dsjonny]

I have a Lenovo T450 laptop with HD Graphics 5500 (Broadwell GT2) and the intel_extreme driver was last worked on hrev55969. Since hrev55991 after the boot icons I have only blank screen. When I use external monitor it also blank but show an error: "unsupported mode". The lastest nighty also tried (hrev56156). I can only boot with safe video mode. I have attached the latest log.

[waddlesplash]

Probably it never worked, because the change of relevance in that range is the adding of the Broadwell device IDs in hrev55988.

Interestingly I have the same device and it works for me, hence why I added the IDs. Maybe it was a bit premature...

[waddlesplash]

The only thing I see in the logs that looks like it could be a problem is:

KERN: intel_extreme: SetPipe: Assuming pipe is assigned by BIOS (fixme)

Otherwise I'm not sure what the problem might be. Hopefully korli might have an idea?

[dsjonny]

As I remember before this commit the I always got black screen during boot, but after this I could load Haiku with Intel graphic instead of VESA:

​https://cgit.haiku-os.org/haiku/commit/?id=ec3df54304a52f0b27334dc098a0f79fab31e3eb

[waddlesplash]

I am confused. Do you mean it only boots when you use VESA/framebuffer (failsafe) driver, or when you select a specific mode you can boot and use the intel_extreme driver?

Or, do you mean that you always got a black screen during boot *before* the change you mention, and now you get something different?

[dsjonny]

So before the mentioned commit I was only able to boot in VESA (selected from boot menu), because if I not selected it I got always black screen after the last icon. After this update with the next nightly build I booted successfully without setting anything in boot menu. But after 1-2 nightly I need to set the VESA mode in boot menu because I got the black screen again.

[waddlesplash]

Hmm, that's strange.

When you have a nightly that "works", can you reboot a number of times and it always works? Or, does it sometimes give a black screen, too?

Perhaps it is an intermittent problem in general?

[korli]

the eDP port tries to get the EDID on the DP AUX, but the hw_cdclk isn't set for Broadwell. this is added by ​https://review.haiku-os.org/c/haiku/+/5355

[dsjonny]

It was always worked with hrev55969. I just plugged in the USB stick and boot it without user intervention. I got the desktop and everything was worked. Since I next updated the Haiku it is not working, I need to select the VESA mode in boot menu to be able to boot the desktop.

[dsjonny]

Sorry, I was wrong with the hrev55969, I found the ticket where comfirmed the intel_extreme update was worked on my laptop. So now I found the working version: hrev56093. I freshly installed it to an USB drive and booted successfully with intel driver (however during boot I enabled the onscreen logging). Please check the attached syslog and screenshot.

[korli]

In hrev56093, the DP aux Ctrl was still hardcoded to a value related to 450MHz. Following revisions changed it to have it dynamic based on hw_cdclk, which wasn't set for broadwell. Please try the following anyboot image with EFI: ​https://haiku.movingborders.es/testbuild/I4bdcca1fdc05294fb5b56c5c96164b6936a5881e/1/hrev56156/x86_64/

[dsjonny]

Hi korli I tested it and it is working, thank you. I attached the screenshot and the syslog also. 1 note: working only with internal laptop display, but not with DisplayPort-connected monitor.

[korli]

Thanks for the test, merged in hrev56158.

Can you confirm, in the syslog the first boot is with the external display connected, and the second without? The DisplayPort-connected monitor setup isn't tested on my side (only with DVI/HDMI adapter).

[dsjonny]

Yes, 1st I tried with external display with mini display port.

And is it possible to change the display between internal and external in runtime? Or is it not possible yet?

[dsjonny]

I have updated and tested hrev56158 nightly x86_64 and with laptop/internal display it is working fine, but external monitor on display port still has a problem. I attached the syslog of booting with external display.