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nvidiadetector.py
#!/usr/bin/python3 ''' Detection tool for nVidia graphics cards ''' # # nvidiadetector.py # # Copyright 2008 Alberto Milone <albertomilone@alice.it> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, # MA 02110-1301, USA. import re from subprocess import Popen, PIPE import sys import logging import apt obsoletePackagesPath = '/usr/share/ubuntu-drivers-common/obsolete' class NoDatadirError(Exception): "Exception thrown when no modaliases dir can be found" class NvidiaDetection(object): ''' A simple class to: * Detect the available graphics cards * See what drivers support them (If they are NVIDIA cards). If more than one card is available, try to find the highest common driver version which supports them all. (READ the comments in the code for further details) * Return the recommended driver version ''' def __init__(self, printonly=None, verbose=None, obsolete=obsoletePackagesPath): ''' printonly = if set to None will make an instance of this class return the selected driver. If set to True it won't return anything. It will simply and print the choice. verbose = if set to True will make the methods print what is happening. ''' # A simple look-up table for drivers whose name is not a digit # "current" is set to 1000 so as to make sure that it always has # the highest priority. self.__driver_aliases = {'current': 1000} self.printonly = printonly self.verbose = verbose self.oldPackages = self.getObsoletePackages(obsolete) self.detection() self.getData() self.getCards() self.removeUnsupported() if printonly: self.printSelection() else: print(self.selectDriver()) def __get_name_from_value(self, value): '''Get the name of a driver from its corresponding integer''' for k, v in self.__driver_aliases.items(): if v == value: return k return None def __get_value_from_name(self, name): '''Get the integer associated to the name of a driver''' v = self.__driver_aliases.get(name) if v is None: if name.endswith('-server'): v = int(name.replace('-server', '')) v = int(name) return v def getObsoletePackages(self, obsolete): '''Read the list of obsolete packages from a file''' tempList = [] try: tempList = [x.strip() for x in open(obsolete).readlines()] tempList = [x for x in tempList if x != ''] except IOError: pass return tempList def detection(self): ''' Detect the models of the graphics cards and store them in self.cards ''' self.cards = [] p1 = Popen(['lspci', '-n'], stdout=PIPE, universal_newlines=True) p = p1.communicate()[0].split('\n') # Display controllers are device class 03 # There are 4 subclasses # 00 VGA compatible controller # 01 XGA compatible controller # 02 3D controller # 80 Display controller # if you don't have an nvidia card, fake one for debugging # p = ['00:02.0 0300: 10DE:03DE (rev 02)'] indentifier1 = re.compile(r'.*03(80|0[0-2]): *(?P<vendor>.+):(?P<device>.+) \(.+\)') indentifier2 = re.compile(r'.*03(80|0[0-2]): *(?P<vendor>.+):(?P<device>.+)') for line in p: m1 = indentifier1.match(line) m2 = indentifier2.match(line) if m1: id1 = m1.group("vendor").strip().lower() id2 = m1.group("device").strip().lower() id = id1 + ':' + id2 self.cards.append(id) elif m2: id1 = m2.group("vendor").strip().lower() id2 = m2.group("device").strip().lower() id = id1 + ':' + id2 self.cards.append(id) def getData(self): ''' Get the data from the modaliases for each driver and store them in self.drivers ''' self.drivers = {} vendor_product_re = re.compile('pci:v0000(.+)d0000(.+)sv') package_re = re.compile(r'nvidia(?:\-driver|)\-([0-9]+)(:?\-server|)(:?\:i386|)') for package in apt.Cache(): if (not package.name.startswith('nvidia-') or 'updates' in package.name or 'experimental' in package.name or 'current' in package.name): continue try: m = package.candidate.record['Modaliases'] except (KeyError, AttributeError): # that's entirely expected for -vdpau and friends; just for # debugging # logging.warning('Package %s has no modalias header' % package.name) continue # package names can be like "nvidia-173:i386" and we need to # extract the driver flavour from the name e.g. "173" package_match = package_re.match(package.name) if package_match: stripped_package_name = package_match.group(1) else: logging.error('%s package has unexpected name scheme. Skipping' % ( package.name)) continue driver_version = self.__get_value_from_name(stripped_package_name) try: if m: m = m[(m.find('(')+1):].replace(')', '') for alias in m.split(','): vp = vendor_product_re.match(alias.lstrip()) if not vp: logging.error('Package %s has unexpected modalias: %s' % ( package.name, alias)) continue vendor = vp.group(1).lower() product = vp.group(2).lower() self.drivers.setdefault(driver_version, []).append( vendor + ':' + product) except ValueError: logging.error('Package %s has invalid modalias header: %s' % ( package.name, m)) # If we didn't find anything useful just print none and exit so as not # to trigger debconf. if len(self.drivers.keys()) == 0: sys.stdout.flush() print('none') # raise ValueError, "modaliases have no useful information" def getCards(self): ''' See if the detected graphics cards are NVIDIA cards. If they are NVIDIA cards, append them to self.nvidiaCards ''' self.driversForCards = {} self.nvidiaCards = [] ''' It is possible to override hardware detection (only for testing purposes) by setting self.cards to one of the following lists: self.cards = ['10de:02e2', '10de:002d', '10de:0296', '10de:087f'] self.cards = ['10de:02e2', '10de:087f'] self.cards = ['10de:02e2', '10de:087f', '10de:fake'] self.cards = ['10de:0288'] # -96 driver only self.cards = ['10de:fake'] ''' for card in self.cards: if card[0: card.find(':')] == '10de': if self.verbose: print('NVIDIA card found (' + card + ')') self.nvidiaCards.append(card) self.orderedList = sorted(self.drivers, reverse=True) ''' See what drivers support each card and fill self.driversForCards so as to have something like the following: self.driversForCards = { 'id_of_card1': [driver1, driver2], 'id_of_card2': [driver2, driver3], } ''' for card in self.nvidiaCards: supported = False for driver in self.orderedList: if card in self.drivers[driver]: supported = True if self.verbose: print('Card %s supported by driver %s' % (card, driver)) self.driversForCards.setdefault(card, []).append(driver) if not supported: self.driversForCards.setdefault(card, []).append(None) def removeUnsupported(self): ''' Remove unsupported cards from self.nvidiaCards and from self.driversForCards ''' unsupportedCards = [] for card in self.driversForCards: if None in self.driversForCards[card]: unsupportedCards.append(card) for unsupported in unsupportedCards: if self.verbose: print('Removing unsupported card ' + unsupported) self.nvidiaCards.remove(unsupported) del self.driversForCards[unsupported] def selectDriver(self): ''' If more than one card is available, try to get the highest common driver ''' cardsNumber = len(self.nvidiaCards) if cardsNumber > 0: # if a NVIDIA card is available if cardsNumber > 1: # if more than 1 card ''' occurrence stores the number of occurrences (the values of the dictionary) of each driver version (the keys of the dictionary) Example: occurrence = {177: 1, 173: 3} This means that driver 177 supports only 1 card while 173 supports 3 cards. ''' occurrence = {} for card in self.driversForCards: for drv in self.driversForCards[card]: occurrence.setdefault(drv, 0) occurrence[drv] += 1 occurrences = sorted(occurrence, reverse=True) ''' candidates is the list of the likely candidates for the installation ''' candidates = [] for driver in occurrences: if occurrence[driver] == cardsNumber: candidates.append(driver) if len(candidates) > 0: ''' If more than one driver version works for all the available cards then the newest one is selected. USE-CASE: If a user has the following cards: * GeForce 9300 (supported by driver 177 and 173) * GeForce 7300 (supported by driver 177 and 173) * GeForce 6200 (supported by driver 177 and 173) Driver 177 is selected. ''' candidates.sort(reverse=True) choice = candidates[0] if self.verbose and not self.printonly: print('Recommended NVIDIA driver: ' + choice) else: ''' Otherwise, if there is no single driver version which works for all the available cards, the newest one is selected. USE-CASE: If a user has the following cards: * GeForce 9300 (supported by driver 177 and 173) * GeForce 1 (supported by driver 71) * GeForce 2 (supported by driver 71) The most modern card has the highest priority since no common driver can be found. The other 2 cards should use the open source driver ''' choice = occurrences[0] if self.verbose and not self.printonly: print('Recommended NVIDIA driver: ' + choice) else: # just one card ''' The choice is easy if only one card is available and/or supported. The newest driver which supports the card is chosen. ''' choice = self.driversForCards[list(self.driversForCards.keys())[0]][0] if self.verbose and not self.printonly: print('Recommended NVIDIA driver: %d' % choice) ''' FIXME: we should use a metapackage for this ''' driver_name = self.__get_name_from_value(choice) if driver_name is not None: choice = (choice >= 390 and 'nvidia-driver-' or 'nvidia-') + str(driver_name) else: choice = (choice >= 390 and 'nvidia-driver-' or 'nvidia-') + str(choice) else: ''' If no card is supported ''' if self.verbose: print('No NVIDIA package to install') choice = None return choice def checkpkg(self, pkglist): ''' USAGE: * pkglist is the list of packages you want to check * use lists for one or more packages * use a string if it is only one package * lists will work well in both cases ''' ''' Checks whether all the packages in the list are installed and returns a list of the packages which are not installed ''' lines = [] notinstalled = [] p1 = Popen(['dpkg', '--get-selections'], stdout=PIPE, universal_newlines=True) p = p1.communicate()[0] c = p.split('\n') for line in c: if line.find('\tinstall') != -1: # the relevant lines lines.append(line.split('\t')[0]) if isinstance(pkglist, str): # if it is a string try: if lines.index(pkglist): pass except ValueError: notinstalled.append(pkglist) else: # if it is a list for pkg in pkglist: try: if lines.index(pkg): pass except ValueError: notinstalled.append(pkg) return notinstalled def getDrivers(self): ''' oldPackages = a list of the names of the obsolete drivers notInstalled = a list of the obsolete drivers which are not installed ''' # FIXME: Commented code to make static tests pass # This piece of code sets installedPackage which is not used anywhere # installedPackage = None notInstalled = self.checkpkg(self.oldPackages) # for package in self.oldPackages: # if package not in notInstalled: # installedPackage = package return (len(notInstalled) != len(self.oldPackages)) def printSelection(self): ''' Part for the kernel postinst.d/ hook ''' driver = self.selectDriver() if self.getDrivers(): # if an old driver is installed if driver: # if an appropriate driver is found sys.stdout.flush() print(driver) else: sys.stdout.flush() print('none') else: # print driver sys.stdout.flush() print(driver) # def usage(): # instructionsList = ['The only accepted parameters are:' # '\n --printonly', '\tprint the suggested driver' # '\n --verbose', '\t\teach step will be verbose' # ] # print(''.join(instructionsList)) # def main(): # err = 'Error: parameters not recognised' # try: # opts, args = getopt.getopt(sys.argv[1:], 'hp:v', ['help', 'printonly', 'verbose']) # except getopt.GetoptError as err: # # print help information and exit: # print str(err) # will print something like 'option -a not recognized' # usage() # sys.exit(2) # printonly = None # verbose = None # for o, a in opts: # if o in ('-v', '--verbose'): # verbose = True # elif o in ('-p', '--printonly'): # printonly = True # elif o in ('-h', '--help'): # usage() # sys.exit() # else: # assert False, 'unhandled option' # a = NvidiaDetection(printonly=printonly, verbose=verbose) # if __name__ == '__main__': # main()