Haiku start correctly only if i set color depth to 16 bit

[Giova84]

Since hrev44528, Haiku show a blank screen (monitor goes in power saving mode) during startup. To solve this, i have to set video mode to monitor's native resolution (1280x1024) and set color depth to 16 bit. If i set color depth to 32 bit, i always get blank screen during startup. My video card is recognized as Intel Extreme Graphics 2.

[diver]

Where do you set the video mode? In the bootloader or in the Screen preflet?

[anevilyak]

You're certain that only started with hrev44528? Nothing's changed in that graphics driver or any other place relevant in quite a while.

[diver]

Also do you use a nightly image or you build it yourself?

[Giova84]

I set the video mode in the bootloader, and when i access to Haiku i see "32 bit" in Screen preflet. The latest revision of Haiku on my computer was hrev44384 and everything was fine. I'm using a nightly image from Haiku files.

[Giova84]

And If i don't set the video mode in the bootloader, my monitor goes in power saving.

[Giova84]

Sorry for the noise. If i set the VESA setting file with monitor resolution and color depth to 16 bit, the startup process is ok.

[diver]

Did you build Haiku yourself?

[Giova84]

Replying to diver:

Did you build Haiku yourself?

Nope. As i've said above i have download a nightly image from Haiku files.

[leavengood]

FWIW I've seen this for a while too on my old Haiku box when connected to a 1080p monitor. But I think part of the problem is not enough video RAM. In fact as I recall I have to run Haiku at 16 bit to get the full resolution working correctly. I think that machine is also using whatever revision of Intel Extreme from that era (it is circa 2005 I think.)

[leavengood]

Well to be completely clear, the monitor goes off when otherwise the bootup screen should be shown, then when Haiku starts it comes back with the Haiku desktop.

[Giova84]

Haiku R1 Alpha4.1: this bug is gone! Now i can start Haiku without VESA mode.

[umccullough]

Can the specific commit that fixed it be identified? Difficult to close it as "fixed" unless we truly know what fixed it.

[diver]

I had the same problem some time ago ​http://dev.haiku-os.org/ticket/8001#comment:55 In that ticket I mentioned that it was because of jam version, but it turned out that it wasn't the case. When I switched monitors the same problematic kernel_x86 binary started working ok. So I think there is still a bug which disappears and then reappears on some configurations (monitors?).

[Giova84]

I had this issue only on intel extreme videocard with any monitors.

[Giova84]

hrev45606. This bug is still here. Haiku Alpha 4.1 is the only one revision where this bug doesn't occurs, for me.

I have noticed, that sometimes, on nightlies, differently as described in this ticket, Haiku will only start if i set a 32 bit depth color. But most of times (with newer nightlies) i have to set (in Haiku boot options) 16 bit depth color. Eg: on hrev45606 Haiku will only start if i set native resolution with 16 bit, but on some old revisions i have to set native resolution with 32 bit. To avoid the necessity to go in boot options every time, i have set the vesa file with needed parameters. In anyway, once i booted to Desktop, if i look in Screen preflet i can see that bit depth color is set to 32 bit (and remember that i start Haiku with 16 bit). And if i don't set native resolution plus 16 bit colors (or 32 bit on some nightlies) The screen remains black and Haiku won't complete the boot process.

[Giova84]

This strange thing still occurs: with hrev45633 Haiku only start if i set the vesa setting file with a color depth of 32 bit, now, with hrev45736, only start with 16 bit.

[Giova84]

Update: on the same computer if i use a HD Radeon 6450 videocard, this behaviour don't occurs. With this videocard i can boot Haiku without setting the monitor's native resolution and without setting the color bit depth to 16 bit. If i plug the onboard videocard (Intel Extreme) i still have to choose fail safe video mode (or set a vesa config file), then, inside Haiku, the color bit depth is set to 32 bit and the Intel extreme driver is properly loaded.

hrev46239

[korli]

It might be worth to provide a clean syslog with a working boot and a non-working-boot.