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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - TURKS [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset the VCPU!!!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63935#c20">Comment # 20</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - TURKS [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset the VCPU!!!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63935">bug 63935</a>
from <span class="vcard"><a class="email" href="mailto:ben@b1c1l1.com" title="Benjamin Lee <ben@b1c1l1.com>"> <span class="fn">Benjamin Lee</span></a>
</span></b>
<pre>I am using a monolithic kernel without initrd (CONFIG_DRM_RADEON=y and
CONFIG_EXTRA_FIRMWARE) using the exact same vmlinuz file between EFI and BIOS
modes, so I don't believe I have a ucode issue since BIOS mode works correctly.
RADEON_AUX_SC_CNTL is different between EFI and BIOS emulation:
blee@supra ~/tmp $ diff bios.regs efi.regs
8c8
< RADEON_AUX_SC_CNTL 52f7377c
---
<span class="quote">> RADEON_AUX_SC_CNTL 52f7337c</span >
46,48c46,48
< RADEON_CRTC2_H_TOTAL_DISP 0200000f
< RADEON_CRTC2_H_SYNC_STRT_WID 00000000
< RADEON_CRTC2_V_TOTAL_DISP 00000100
---
<span class="quote">> RADEON_CRTC2_H_TOTAL_DISP 0000000f
> RADEON_CRTC2_H_SYNC_STRT_WID 00003f3f
> RADEON_CRTC2_V_TOTAL_DISP 00000000</span >
I built a separate kernel for fglrx and found that RADEON_AUX_SC_CNTL matched
the BIOS emulation mode:
blee@supra ~/tmp $ diff fglrx.regs bios.regs
46c46
< RADEON_CRTC2_H_TOTAL_DISP 0203000f
---
<span class="quote">> RADEON_CRTC2_H_TOTAL_DISP 0200000f</span ></pre>
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