building the 2.6.26 kernel with the defalult g5_defconfig will cause the iMac to lose the console. The machine will boot, but the console remains blank. Everything else appears to work (other than know issues) but the console. I can ssh to the machine ... The 2.6.24 kernel does not have this issue. Reproducible: Always Steps to Reproduce: iMac G5 iSight system (PowerMac 12,1, PPC970FX processor, ATI Radeon X600 video) 1.emerge latest kernel (2.6.26 or 2.6.27) 2.build with g5_defconfig; config yaboot; etc 3.boot new kernel 4.no screen Actual Results: System starts to boot, get a few messages. When the initial bootup console switches over to new colour console, the console becomes unuseable. Expected Results: login prompt The following sections of /proc/iomem show how the mapping differs: /proc/iomem 2.6.24(pci@0 ATI card) /proc/iomem 2.6.26 (pci@0 ATI card) 90000000-9fffffff : /pci@0,f0000000 90000000-9fffffff : /pci@0,f0000000 90000000-9000ffff : 0000:04:00.0 90000000-9bffffff : PCI Bus 0000:04 90020000-9003ffff : 0000:04:00.0 90000000-97ffffff : 0000:04:00.0 98000000-9fffffff : 0000:04:00.0 98000000-9801ffff : 0000:04:00.0 98008000-9836553f : offb 9c008000-9c1213ff : offb 9c008000-9c1213ff : offb a0000000-efffffff : /ht@0,f2000000 a0000000-efffffff : /ht@0,f2000000 f1000000-f1ffffff : /pci@0,f0000000 f1000000-f1ffffff : /pci@0,f0000000 f1000000-f10fffff : PCI Bus 0000:04 f1000000-f100ffff : 0000:04:00.0 Tried emerging the 2.6.27 kernel and pulled a kernel from GIT (2.6.28). Adding the following code lines: 1314 and 1322-1327 in file: /usr/src/linux/arch/powerpc/kernel/pci-common.c adjusts the iomem mappings so that the console works for the 2.6.28 kernel. 1310 1311 static inline void __devinit alloc_resource(struct pci_dev *dev, int idx) 1312 { 1313 struct resource *pr, *r = &dev->resource[idx]; 1314 struct pci_dev *d1 = dev->bus->self; 1315 1316 DBG("PCI: alloc_resource (pci-common.c) Allocating %s: Resource %d: %016llx..%016llx [%x]\n", 1317 pci_name(dev), idx, 1318 (unsigned long long)r->start, 1319 (unsigned long long)r->end, 1320 (unsigned int)r->flags); 1321 1322 if ( (strcmp(pci_name(dev),"0000:04:00.0") == 0) && (idx == 0 || idx == 2) ){ 1323 printk("HRF: alloc_resource using dev bus self: %d \n",d1->devfn); 1324 pr = pci_find_parent_resource(d1, r); 1325 } else { 1326 pr = pci_find_parent_resource(dev, r); 1327 } 1328 1329 if (!pr || (pr->flags & IORESOURCE_UNSET) || request_resource(pr, r) < 0) { 1330 printk(KERN_WARNING "PCI: Cannot allocate resource region %d" 1331 " of device %s, will remap\n", idx, pci_name(dev)); 1332 if (pr) { 1333 DBG("PCI: parent is %p: %016llx-%016llx [%x]\n", pr, 1334 (unsigned long long)pr->start, 1335 (unsigned long long)pr->end, 1336 (unsigned int)pr->flags); 1337 /* We'll assign a new address later */ 1338 r->flags |= IORESOURCE_UNSET; 1339 r->end -= r->start; 1340 r->start = 0; 1341 } 1342 } 1343 }
Please file an upstream bug for this at http://bugzilla.kernel.org and post the new URL here. Thanks!
Please reopen this bug when you've filed a report upstream
