From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ondrej Zary Date: Tue, 09 Dec 2014 21:33:16 +0000 Subject: Compiled tridentfb hangs but distribution kernel works fine Message-Id: <201412092233.17030.linux@rainbow-software.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org Cc: Kernel development list 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