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为宽屏的分辩率率一和普通屏的不一样，如：1280*768，一些厂家的linux还不支持这些非传统标准的分辨率！ 这几天天天在老外的论坛里转，终于第一时间看到for 915GM的video BIOS修改程序，可以直接修改内存里有mode line叁数，让系统支持宽屏显示！ 另也找到了，最新的915GM的驱动，经过第三方修改的（奇怪的是Intel提供的不能正常工作，第三方的倒是可以，有了它才能真正发挥915GM的显示能力啊，那个vesa的驱动，太慢了，呵呵） 因这里不好上传附件，只能把原码贴上来了，是那个支持宽屏的修正程序，自己编译一下，如下： #gcc 915resolution.c -o 915resolution 然后运行 915resolution 5c 1280*768 然后写一脚本，让系统每次启动自动运行！呵呵！ 915GM的驱动，大了点，不好贴上来，需要的朋友加我QQ，传给你！ #include #include #include #define __USE_GNU #include #include #include #include #include #include #define NEW(a) ((a *)(calloc(1, sizeof(a)))) #define FREE(a) (free(a)) #define VBIOS_START 0xc0000 #define VBIOS_SIZE 0x10000 #define VBIOS_FILE "/dev/mem" #define VBIOS_OFFSET_IN_FILE VBIOS_START #define CFG_SIGNATURE "BIOS_DATA_BLOCK " #define FALSE 0 #define TRUE 1 typedef unsigned char * address; typedef unsigned char boolean;
typedef struct { unsigned char mode; unsigned char bits_per_pixel; unsigned short resolution; unsigned char unknown; } __attribute__((packed)) vbios_mode; typedef struct { unsigned char unknow1[2]; unsigned char x1; unsigned char unknow2; unsigned char x2; unsigned char y1; unsigned char unknow3; unsigned char y2; } __attribute__((packed)) vbios_resolution; typedef struct { int bios_fd; address bios_ptr; address cnfg_ptr; vbios_mode * mode_table; int mode_table_size; boolean unlocked; } vbios_map; void initialize_system(); char * get_chipset(void); vbios_map * open_vbios(); void close_vbios(vbios_map * map); void unlock_vbios(vbios_map * map); void relock_vbios(vbios_map * map); void initialize_system(void) { if (iopl(3) < 0) { perror("Unable to obtain the proper IO permissions"); exit(2); } } static unsigned int get_chipset_id(void) { outl(0x80000000, 0xcf8); return inl(0xcfc); } static char chipset_buffer[256]; char * get_chipset(void) { unsigned int id; char * name; id = get_chipset_id(); switch (id) { case 0x25608086: name = "845G"; break; case 0x35808086: name = "855GM"; break; case 0x25708086: name = "865G"; break; case 0x25908086: name = "915GM"; break; default: sprintf(chipset_buffer, "Unknown (0x%08x)", id); name = chipset_buffer; break; } return name; } vbios_map * open_vbios() { vbios_map * map = NEW(vbios_map); /* * Map the video bios to memory */ map->bios_fd = open(VBIOS_FILE, O_RDWR); if(map->bios_fd < 0) { perror("Unable to open the BIOS file"); exit(2); } map->bios_ptr = mmap((void *)VBIOS_START, VBIOS_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, map->bios_fd, VBIOS_OFFSET_IN_FILE); if (map->bios_ptr == NULL) { fprintf(stderr, "Cannot mmap() the video BIOSn"); close(map->bios_fd); exit(2); } /* * figure out where the configuration information is */ map->cnfg_ptr = memmem(map->bios_ptr, VBIOS_SIZE, CFG_SIGNATURE, strlen(CFG_SIGNATURE)); if (map->cnfg_ptr == NULL) { fprintf(stderr, "Couldn't find the configuration area in the VBIOS!n"); close_vbios(map); exit(2); } /* * Figure out where the mode table is and which type of bios we have */ { address p = map->bios_ptr; address limit = map->bios_ptr + VBIOS_SIZE - (3 * sizeof(vbios_mode)); while (p < limit && map->mode_table == 0) { vbios_mode * mode_ptr = (vbios_mode *) p; if (((mode_ptr[0].mode & 0xf0) == 0x30) && ((mode_ptr[1].mode & 0xf0) == 0x30) && ((mode_ptr[2].mode & 0xf0) == 0x30) && ((mode_ptr[3].mode & 0xf0) == 0x30)) { map->mode_table = mode_ptr; } p++; } if (map->mode_table == 0) { fprintf(stderr, "Unable to locate mode table!n"); close_vbios(map); exit(2); } } /* * Determine size of mode table */ { vbios_mode * mode_ptr = map->mode_table; while (mode_ptr->mode != 0xff) { map->mode_table_size++; mode_ptr++; } } return map; } void close_vbios(vbios_map * map) { assert(!map->unlocked); if(map->bios_ptr == NULL) { fprintf(stderr, "
