Hi
Am 18.09.25 um 04:04 schrieb Nick Bowler:
On Wed, Sep 17, 2025 at 11:14:45AM -0400, Nick Bowler wrote:
On Fri, Aug 29, 2025 at 03:07:14PM +0200, Thomas Zimmermann wrote:
The ast driver doesn't do much during shutdown. Could you please out-comment
the lines at either [2] xor [3] and report on either effect? These calls
turn of the video chip's memory access and sync pulses. Not doing that might
resolve the problem.
[2]
https://elixir.bootlin.com/linux/v6.16.3/source/drivers/gpu/drm/ast/ast_mode.c#L835
[3]
https://elixir.bootlin.com/linux/v6.16.3/source/drivers/gpu/drm/ast/ast_mode.c#L839
I can try this.
OK, I tested 6.17-rc6 and reproduced the problem on this version. Then:
- Deleting [2] (only) appears to make no difference whatsoever. That
is, deleting the following line in ast_mode.c:
ast_set_index_reg_mask(ast, AST_IO_VGASRI, 0x01, 0xdf, AST_IO_VGASR1_SD);
- Deleting [3] (only) appears sufficient to make things work again,
that is, deleting the following line in ast_mode.c:
ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xfc, vgacrb6);
Great, thanks for testing! I'll see if i can make a workaround for your
system.
Could you please provide me with 'lspci -nvv' of the device?
Best regards
Thomas
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
HRB 36809 (AG Nuernberg)
