Hello,
I'm doing some work on tridentfb driver but encountered a weird problem.
When I compile custom kernel with tridentfb, it hangs with Blade3D card (ID
0x9880) in blade_image_blit(). The screen is blank with some artifacts and
machine does not respond to ping or keyboard. However, it can be rebooted by
Alt+SysRq+B. It works fine with other cards (3DImage 9750 and CyberBlade XP)
with no blit implementation. Commenting out contents of blade_image_blit()
function makes the hang go away (nothing useful on the screen, of course).
The weird thing is that the Blade3D card works fine when I load Debian
kernels! Debian 3.16-0.bpo.3-686-pae works fine but when I compile 3.16
kernel, it hangs.
Any ideas?
--
Ondrej Zary
On Tue, 2014-12-09 at 22:33 +0100, Ondrej Zary wrote:
Hello,
I'm doing some work on tridentfb driver but encountered a weird problem.
When I compile custom kernel with tridentfb, it hangs with Blade3D card (ID
0x9880) in blade_image_blit(). The screen is blank with some artifacts and
machine does not respond to ping or keyboard. However, it can be rebooted by
Alt+SysRq+B. It works fine with other cards (3DImage 9750 and CyberBlade XP)
with no blit implementation. Commenting out contents of blade_image_blit()
function makes the hang go away (nothing useful on the screen, of course).
The weird thing is that the Blade3D card works fine when I load Debian
kernels! Debian 3.16-0.bpo.3-686-pae works fine but when I compile 3.16
kernel, it hangs.
Any ideas?
I'd start by looking for what Debian changed in source and/or config.
-Mike
On Wednesday 10 December 2014 08:15:04 Mike Galbraith wrote:
On Tue, 2014-12-09 at 22:33 +0100, Ondrej Zary wrote:
quoted
Hello,
I'm doing some work on tridentfb driver but encountered a weird problem.
When I compile custom kernel with tridentfb, it hangs with Blade3D card
(ID 0x9880) in blade_image_blit(). The screen is blank with some
artifacts and machine does not respond to ping or keyboard. However, it
can be rebooted by Alt+SysRq+B. It works fine with other cards (3DImage
9750 and CyberBlade XP) with no blit implementation. Commenting out
contents of blade_image_blit() function makes the hang go away (nothing
useful on the screen, of course).
The weird thing is that the Blade3D card works fine when I load Debian
kernels! Debian 3.16-0.bpo.3-686-pae works fine but when I compile 3.16
kernel, it hangs.
Any ideas?
I'd start by looking for what Debian changed in source and/or config.
Seems that the problem appears only of CONFIG_CC_OPTIMIZE_FOR_SIZE is enabled.
Really weird.
--
Ondrej Zary