<div dir="ltr"><div>Michel,<br><br></div>Yes to both, however when I set radeon.agpmode=1 most of the time the kernel freezes when booting. When I do get past that I get these errors:<br><br>rican-linux@Debian-G5:~$ dmesg |grep -e radeon -e drm<br><b>[ 0.000000] Kernel command line: root=UUID=aeca9a67-31d7-4c4b-a0f8-4db328b33305 radeon.agpmode=1</b><br>[ 10.432049] [drm] Initialized drm 1.1.0 20060810<br>[ 11.291427] [drm] radeon kernel modesetting enabled.<br>[ 11.302838] fb: switching to radeondrmfb from OFfb ATY,Simone<br>[ 11.317952] fb: switching to radeondrmfb from OFfb ATY,Simone<br>[ 11.321318] radeon 0000:f0:10.0: enabling device (0006 -> 0007)<br>[ 11.321741] [drm] initializing kernel modesetting (RV350 0x1002:0x4150 0x1002:0x4150 0x00).<br>[ 11.321770] [drm] register mmio base: 0xA0000000<br>[ 11.321776] [drm] register mmio size: 65536<br>[ 11.321820] radeon 0000:f0:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000<br>[ 11.415530] [drm] Not an x86 BIOS ROM, not using.<br>[ 11.415573] [drm] Using device-tree clock info<br><b>[ 11.415769] [drm:.radeon_agp_init [radeon]] *ERROR* Illegal AGP Mode: 1 (valid 4, 8), leaving at 8</b><br>[ 11.415818] radeon 0000:f0:10.0: putting AGP V3 device into 8x mode<br>[ 11.415925] radeon 0000:f0:10.0: GTT: 256M 0x00000000 - 0x0FFFFFFF<br>[ 11.415933] [drm] Generation 2 PCI interface, using max accessible memory<br>[ 11.415943] radeon 0000:f0:10.0: VRAM: 256M 0x00000000B0000000 - 0x00000000BFFFFFFF (64M used)<br>[ 11.415987] [drm] Detected VRAM RAM=256M, BAR=256M<br>[ 11.415993] [drm] RAM width 128bits DDR<br>[ 11.416229] [drm] radeon: 64M of VRAM memory ready<br>[ 11.416237] [drm] radeon: 256M of GTT memory ready.<br>[ 11.416308] [drm] radeon: 1 quad pipes, 1 Z pipes initialized.<br>[ 11.431606] radeon 0000:f0:10.0: WB disabled<br>[ 11.431627] radeon 0000:f0:10.0: fence driver on ring 0 use gpu addr 0x0000000000000000 and cpu addr 0xd000000003ee0000<br>[ 11.431642] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).<br>[ 11.431648] [drm] Driver supports precise vblank timestamp query.<br>[ 11.431700] [drm] radeon: irq initialized.<br>[ 11.431743] [drm] Loading R300 Microcode<br>[ 11.488921] radeon 0000:f0:10.0: firmware: direct-loading firmware radeon/R300_cp.bin<br>[ 11.489178] [drm] radeon: ring at 0x0000000000010000<br><b>[ 11.637210] [drm:.r100_ring_test [radeon]] *ERROR* radeon: ring test failed (scratch(0x15E4)=0xCAFEDEAD)<br>[ 11.637318] [drm:.r100_cp_init [radeon]] *ERROR* radeon: cp isn't working (-22).<br>[ 11.637331] radeon 0000:f0:10.0: failed initializing CP (-22).<br>[ 11.637338] radeon 0000:f0:10.0: Disabling GPU acceleration<br>[ 11.784325] [drm:.r100_cp_fini [radeon]] *ERROR* Wait for CP idle timeout, shutting down CP.<br>[ 11.931351] [drm] radeon: cp finalized</b><br><b>[ 11.931464] radeon 0000:f0:10.0: (r300_asic_reset:425) RBBM_STATUS=0x80010140<br>[ 12.431463] radeon 0000:f0:10.0: (r300_asic_reset:444) RBBM_STATUS=0x80010140<br>[ 12.927471] radeon 0000:f0:10.0: (r300_asic_reset:456) RBBM_STATUS=0x00000140<br>[ 12.927510] radeon 0000:f0:10.0: GPU reset succeed</b><br><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 19, 2016 at 8:05 PM, Michel Dänzer <span dir="ltr"><<a href="mailto:michel@daenzer.net" target="_blank">michel@daenzer.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 19/09/16 09:36 PM, Mathieu Malaterre wrote:<br>
><br>
> Finally your dmesg looks odd since the line `[drm] Forcing AGP to PCI<br>
> mode` comes only after the first error.<br>
<br>
</span>That isn't odd but the AGP->PCI(e) fallback mechanism working as<br>
intended, trying AGP first and falling back to PCIe if AGP fails.<br>
<br>
Herminio, does the problem also occur if you specify radeon.agpmode=-1<br>
(or maybe =1) on the kernel command line?<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
--<br>
Earthling Michel Dänzer | <a href="http://www.amd.com" rel="noreferrer" target="_blank">http://www.amd.com</a><br>
Libre software enthusiast | Mesa and X developer<br>
</div></div></blockquote></div><br></div>