Re: PROBLEM: AST2500 BMC video output disabled by reboot (regression)

[Thomas Zimmermann <tzimmermann@suse.de>]

Hi

Am 10.10.25 um 01:56 schrieb Nick Bowler:
> Hello,
>
> On Tue, Oct 07, 2025 at 10:51:29AM +0200, Thomas Zimmermann wrote:
>> Am 04.10.25 um 02:31 schrieb Nick Bowler:
>>> But it introduces a new problem: the screen no longer turns back on if
>>> I boot the patched kernel from the "display off" state.  The unpatched
>>> 6.17 kernel would at least turn the display back on from this.
>>> Furthermore, rebooting from this state keeps the display off.
> [...]
>> Thanks again for testing. Looks like your BMC is especially picky about
>> these settings. :)
>>
>> Attached are two patches; each trying to eliminate one of the possible
>> causes. Could you please test them individually and report the results?
> 0001-ast-Use-VGACR17-sync-enable-and-VGACRB6-sync-off.patch
>    ^ Everything appears to work fine with this patch applied on
>      top of 6.17.

That's great news. I'll prepare the patch so that it can go into the 
kernel. Thanks again for testing.

Best regards
Thomas

>
> 0001-ast-Use-VGACR17-sync-enable-and-VGASR01-screen-disab.patch
>    ^ This one has the same problem as the last patch: the screen
>      does not turn back on if it was previously off during bootup.
>
> Thanks,
>    Nick

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
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